This Scottish DJ/producer/songwriter made his name through massive club hits and remixes. Harris' recent album, 18 Months, is a euphoric mix of house, '80s electro-funk and rock.
We've got some good news. Whether you missed out on tickets or went along and wanna relive the night, you can watch this performance live or on-demand.
Check it out on iPhone, iPad or iPod touch, iTunes on your computer or in stunning HD with Apple TV. Visit www.itunes.com/festival for more information. Join the conversation using #itunesfestival.