Colorado's 3oh3! pumped their massive tunes out at full blast to a packed tent that loved every minute of their quick half hour show.
10,000 lunchtime drunks threw Tuborg down their throat before dancing around in rapture, delighted as much at the kick-off of Leeds Festival 2010 as they were at great hits like 'My First Kiss'.
The party swelled as fans burst into a rousing rendition of 'Happy Birthday' for singer Shaun's 25th, while his bandmates presented him with a chocolate muffin complete with cigarette candle.
The festival continues with sets from Arcade Fire, The Libertines and more.