Just about every popstar on the planet has signed up to sing some songs at the Capital Summertime Ball, which takes place on June 21 at Wembley Stadium.
Here's the list in no particular order: Pharrell, Miley Cyrus, Cheryl Cole, Union J, Ed Sheeran, Calvin Harris, Ellie Goulding, Enrique Iglesias, David Guetta, Rita Ora, Sam Smith, Little Mix, The Vamps, Clean Bandit, Duke Dumont, 5 Seconds Of Summer and Jessie J.
Blimey.
Tickets go on sale this Friday at 8am (!) and you can buy them at capitalfm.com or via the Capital ticket line on 0330 33 33 968.