Piers Morgan was left stunned this morning after Alex from Glastonbury appeared on the show.
Alex Mann, 15, appeared on stage with rapper Dave at the weekend and caused an absolute storm.
Alex, who was wearing a PSG shirt, was picked from the crowd to sing Dave's hit Thiago Silva.
Speaking on GMB Alex , from Wells, said: "I was on my mate Sam's shoulders and I really wanted to sing with Dave.
"I saw him in Bristol and he brought someone up on stage then, so I thought he might do it again.
"But I was really nervous when I got up there, but Dave said he'd help me."
Since his appearance on the show Alex's Instagram and Twitter following has gone through the roof.
He's also been contacted by Boohoo for a modelling job and is set to perform at venues.
Alex then performed some of the rap live on the show - as Piers dad danced along.
Piers was full of praise for Alex and said: "You took your chance and you slayed Glastonbury - it's a brilliant thing - more young people should be doing that, taking their chances and slaying it.
*GMB continues at 6am on ITV tomorrow
