Reading and Leeds: Backstage tour of the festival site
23 August 2013 Last updated at 08:58 BST
Green Day, Eminem and Biffy Clyro and 200 other acts will be performing at the Reading and Leeds this weekend.
Newsbeat's music reporter Sinead Garvan took a tour of the Reading festival site.
She even managed to peek into some of the dressing rooms.
Up to 90,000 music fans are set to attend Reading and Leeds festivals over the weekend.