A superfan of 5ive made Everybody Get Up when he got to rap with them at their Norwich gig to win a signed t-shirt.
Jan Mulder, 25, from Lowestoft, managed to bag a spot in the front row at the sold-out Boys are Back show in the UEA LCR on Monday night, which featured chart-topping nineties boybands 5ive, A1, 911 and Damage.
Mr Mulder has been a fan of 5ive since he was little and bought their second album Invincible at a car boot sale.
The group, which first formed in 1997, now consists of Sean Conlon, Ritchie Neville and Scott Robinson and if they are looking for extra members then they need look no further.
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Mr Mulder, who runs Aux Records in Lowestoft, captured the attention of the band during their set as he enthusiastically sung every word of their songs, which led them to hand him the microphone to sing part of hits Got the Feelin' and Lay All Your Lovin' On Me.
When the trio decided to sign a t-shirt to hand out to someone in the crowd, the audience got behind Mr Mulder and chanted 'dude in the hat'.
The group then said that he would need to work for it and asked him his favourite 5ive rap to perform and he replied with Battlestar, which is from the Invincible album.
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Mr Mulder was word-perfect and had the band rapping along with him and the clip was shared afterwards on Facebook by his friend Vicky Gaff.
Mr Mulder said: 'They were one of the first bands I listened to when I was growing up and I like them as they are a bit edgy and a little bit rough around the edges.
'It was a dream come true to perform with them and I embraced the moment and did the whole first verse and chorus.
'When I was leaving the venue people wanted to take pictures with me and I got around 20 selfies.
'Pop music is my number one love alongside my work and I go and see as many gigs as I can.'
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