Where is it?
Balado, near Kinross, Scotland
When is it? 11-13 July
Who's gonna be there?
You may not have heard of headliners The Verve, Rage Against the Machine, and REM, but take our word for it - they were HUGE in the 90s.
And there are loads more acts playing that you will have heard of, including Amy Winehouse, The Hoosiers, and The Kooks.
What's it like?
Get ready to rock!
This is Scotland's top music festival, and attracts about 50,000 music fans each day.
This year there's a real green-theme, with festival goers encouraged to recycle and leave their cars at home.
Anything else I should know?
Children under five aren't allowed at the festival, and under 16s must have a full-price ticket and be with an adult over the age of 21.