American Idol star Adam performed for 25 minutes at the music event in Birmingham, but it clearly wasn't enough as fans began chanting his name as he finished his set.
Adam performed fan favourites including 'Another Lonely Night' and 'Whataya Want from Me', and he showcased his phenomenally flawless vocals and incredible range as he worked all areas of the stage.
Having come in second place on American Idol in 2009, Adam has grown a very large fanbase.
Reveal bumped into two massive Adam fans, who arrived to Birmingham from Wales and queued up from 5am on the day to get a spot at the very front of the stage.
They waited some 13 hours in the rain just to watch the singing sensation, and said Adam was "incredible" on stage, adding: "The wait was more than worth it!"
You have some very dedicated fans, Adam!
This year's Fusion Festival with Vimto saw 50,000 people attend over the three-day festival. To catch up on all the highlights from Fusion Festival 2015, tune into 4Music on Saturday 5 September from 3pm to watch Fusion Festival 2015: The Best Bits.
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