Soul musician Michael Kiwanuka told Glastonbury's Pyramid Stage crowd that he was having his 'worst nightmare' amid technical issues during his set.
The British singer-songwriter, 37, appeared to struggle while performing Solid Ground and took breaks before abandoning the track.
He told festival goers to 'hold on' before adding 'sorry, this is out of tune', referring to his keyboard.
'I'm sorry, like this is my worst nightmare,' Kiwanuka said as the crowds cheered him on.
He explained that there was supposed to be 'a synth thing' and then go 'seamlessly' into the next track. He tried again before going back to play his guitar and the song Cold Little Heart.
Soul musician Michael Kiwanuka told Glastonbury's Pyramid Stage crowd that he was having his 'worst nightmare' amid technical issues during his set
He told festival goers to 'hold on' before adding 'sorry, this is out of tune', referring to his keyboard
The British singer-songwriter, 37, appeared to struggle while performing Solid Ground and took breaks before abandoning the track
It comes afterCyndi Lauper's Glastonbury performanceon Saturday was hit with criticism after major sound problems disrupted the set.
Festival goers were left struggling to hear the Girls Just Wanna Have Fun singer's vocals as her voice was drowned out by rumbling bass.
After a few songs, Cyndi, 71, performed Rocking Chair and she seemed to struggle with her pitch and timing.
The sound issues appeared to have been resolved by the time she got to her hit I Drove All Night.
But Cyndi faltered again on her1984 track Time After Time as she lagged behind the band - suggesting she was having trouble with her in-ear monitors.
The popular festival has had other noticeable moments too, including Friday night's set, where Banksy let loose aninflatable boat with dummy migrants which was launched onto the crowd during a performance by the Idles.
The Saturday edition of the event at Worthy Farm also marks Coldplay's first Pyramid Stage appearance since 2016, and will see them overtake The Cure, who have headlined the slot four times.
Frontman Chris Martin, guitarist Jonny Buckland, drummer Will Champion and bassist Guy Berryman will follow pop superstar Dua Lipa, who headlined the festival on Friday.
Cyndi Lauper's Glastonbury performance on Saturday was hit with criticism after major sound problems disrupted the set
Festival goers were left struggling to hear the Girls Just Wanna Have Fun singers vocals as her voice was drowned out by rumbling bass
A look at the enormous crowds in attendance at Glastonbury festival for Lauper
Founded by Michael Eavis in 1970, Glastonbury Festival features around 3,000 performances across over 80 stages
A festival-goer using an umbrella and a fan to try to cool down
Music goers during day four of Glastonbury Festival 2024 at Worthy Farm
A festival goer pictured before the Cyndi Lauper performance
Renowned for its vibrant atmosphere and iconic Pyramid Stage, the festival offers a diverse lineup of music and arts, embodying a spirit of community, creativity, and environmental consciousness
The Last Dinner Party pictured performing on the Pyramid Stage earlier today
Performs walk through the Theatre and Circus area on the fourth day
Lauper, who is set for what is 'billed' as a farewell tour in the UK next year, wore a jacket with a blue train, a silver bodice and silver pants on the Pyramid Stage.
She opened with her 1980s track The Goonies 'R' Good Enough while dealing with mic issues. But the technical problems appeared to be improving when she performed her biggest hits Time After Time, Money Changes Everything, True Colours and I Drove All Night.
During her performance of Girls Just Wanna Have Fun, Lauper's audio improved and she made reference to feminist marches, that in 2017 saw US women wear lots of pink 'puss*hats'.
To cheers, Lauper told the crowd: 'I was watching TV and I saw all these women all over the world marching, with some pink hats and... my friend called me up and said 'to get the hell out there (Cyndi)' so I did I went out and I saw the signs that said Girls Just Want To Have Fundamental Rights, that's right.'
She added that she was 'partnering-up' with her Girls Just Want To Have Fundamental Rights Fund on Saturday, which 'funds organisations all around the world to help young women, older women, women (who want) reproductive rights, autonomy over their own bodies'.
Lauper also highlighted the maternal health organisation White Ribbon Alliance, who she said were at the front, before saying: 'It is time that the world leaders understand that women are half the population of the world and we deserve to be treated equally, no matter where we're from or what we look like.'
She also made several references to the UK, including mentioning the West End production of Kinky Boots ahead of My Father's Son and her Change Of Heart music video that saw her dancing in London's Leicester Square.
Lauper also had a solo moment with the recorder, during her second track, the controversial She Bop.
Indie rockers Kasabian, who headlined at the Pyramid Stage in 2014, confirmed they will be one of the secret shows, following them not originally being announced as part of the festival's line-up.
There was a 'TBA' slot on the Woodsies Stage, formerly the John Peel Stage, for 6pm, before the band told fans on social media that 'they will see' them in the evening.
The Pyramid Stage kicked off at 12pm with musician Femi Kuti before seeing fellow Nigerian musician Ayra Starr deliver a triumphant Afrobeat performance, featuring plenty of crowd work.
Anya Taylor-Joy and Cara Delevingne watch The Last Dinner Party perform
Broadcaster Ros Atkins plays a drum and bass Set at The Stonebridge Bar
A member of pit security handing out water to the crowd watching Femi Kuti on the Pyramid Stage,
Festivalgoers stand in the crowd as US singer Cyndi Lauper performs on the Pyramid stage
estival goers listen to British band The Last Dinner Party
Members of the Rajasthan Heritage Brass Band perform in the Theatre and Circus area
A costumed festival goer listens to Nigerian musician Femi Kuti
Next up on the main stage is Cyndi Lauper, who is set to hold what is billed as her final series of live shows with the Girls Just Wanna Have Fun Farewell Tour next year.
A total of 71 alleged offences inside and outside the perimeter at Glastonbury have been reported since Wednesday, according to Avon and Somerset Police.
This includes one sexual offence, 22 cases of theft and 11 drug offences.
A police spokesperson told PA that 13 arrests have been made between Wednesday and Saturday morning, some of which have included people being arrested for multiple offences.
Eight of the arrests have been on suspicion of at least one drug-related offence and four of those eight have also been arrests on suspicion of theft.
Among the acts gracing the Pyramid Stage on Saturday is indie band Keane who are playing at 4pm.
The band's frontman Tom Chaplin told PA they will be keeping their set 'quite simple'.
He also revealed they will be playing hits from their debut studio album Hopes And Fears, which turned 20 this year.
Also celebrating its 20th anniversary this year is cult horror comedy Shaun Of The Dead.
At a Q&A event Simon Pegg spoke about the film's impact and reflected on his time at Glastonbury so far, calling Idles' Friday night set 'literally one of the greatest performances I've ever seen at Glastonbury'.
Dua Lipa described her Glastonbury experience as 'the maddest night of my life' when she took to the stage on Friday and treated revellers to a selection of her popular tracks, including These Walls, Break My Heart, Hallucinate, Electricity, Physical and Don't Start Now.
'This has been a massive dream come true,' Dua Lipa said before adding, 'Glastonbury, I love you.'
Earlier on the Pyramid Stage, Paul Heaton and Norman Cook reunited to perform a Housemartins classic.
Heaton surprised festival-goers by bringing out his former bandmate Cook, better known as Fatboy Slim, to perform their 1986 hit Happy Hour.
Damon Albarn also made a surprise appearance at the festival, asking the crowd whether the war in Gaza was 'unfair' and suggesting Joe Biden was too old to be US president when he was invited on stage by Bombay Bicycle Club's Jack Steadman.
Neo-soul singer Olivia Dean dedicated her song Carmen to her grandmother and other members of the Windrush generation while wearing a T-shirt with her grandmother's face on it.
The festival also saw British actress Florence Pugh reveal she is 'tiptoeing' towards directing and producing films, as she appeared during a Dune: Part Two Q&A.
Elsewhere, Lady Bird actress Saoirse Ronan made a surprise appearance during a Q&A for Andrew Haigh-directed film All Of Us Strangers at indoor cinema space Pilton Palais where she interviewed the filmmaker and stars Andrew Scott and Paul Mescal.
Festival goers listen to British band The Last Dinner Party
Notting Hill Carnival performers dance with the public at the Carhenge area
Festival-goers sit amongst rubbish on day three of the Glastonbury Festival at Worthy Farm near Pilton, Somerset
Meanwhile, Charlotte Church sang 'Free Palestine' with a crowd of hundreds as she led an improvised number during an intimate and politically charged appearance at Glastonbury.
The Welsh singer's performance at Worthy Farm comes months after she needed police protection after attending a pro-Palestine march in London, with her family also threatened.
Other festivities have included a tribute to the late DJ Annie Nightingale, the first female presenter on BBC Radio 1, who died in January at the age of 83.
And mere days after the birth of his fourth child, Joe Wicks led a mass fitness session on the Pyramid Stage.
On Sunday, American R&B singer SZA will headline the festival, with country music star Shania Twain to play the coveted Legends slot.
