If you're planning on watching Live Earth and want to know when the decent bits will be on, here's our guide to the highlights of Saturday's London leg running order.
All artists appearing are shown, with the announced setlists for selected acts.
Radio 1's Chris Moyles will introduce Genesis who'll kick off the day, followed by Razorlight who'll perform 'Before I Fall To Pieces' and 'America'.
Snow patrol are next, playing 'Open Your Eyes', 'Shut Your Eyes' and 'Chasing Cars', followed by an appearance from David Gray and Damien Rice.
Kasabian will then take to the Wembely Stadium stage to play 'Empire', 'Club Foot and 'ID'.
Paolo Nutini, Black Eyed Peas, John Legend and Duran Duran are next, with the latter expected to be joined by Justin Timberlake.
Reading and Leeds headliner Red Hot Chili Peppers set will feature 'Can't Stop', 'Dani California', 'So Much I' and 'By The Way'.
Fresh from T in the Park the previous night, Bloc Party will then play 'Hunting For Witches', 'Banquet', 'So Here We Are' and 'The Prayer'.
Corinne Bailey Rae and Keane will take turns to entertain the Wembely crowd, before rock legends Metallica play their first of two sets at the new venue. Their four songs will be 'Enter Sandman', 'Nothing Else Matters', 'Sad But True' and 'For Whom The Bell Tolls'.
They will then return the following night to headline the London show on their 'Sick of the Studeo' tour which Room Thirteen will be bringing you reviews from.
Metallica will be followed by one of the most talked about appearances of the whole day, the reformation of Spinal Tap, who's set will feature 'Stonehenge', 'Warmer Than Hell' and 'Big Bottom'.
James Blunt and Alicia Keys will give you the chance to make a cup of tea, don't overfill that kettle mind, before Russell Brand introduces the Beastie Boys set of 'Sabotage', 'So What'cha Want', 'Sure Shot', 'Intergalactic' and 'Off The Grid'.
Pussycat Dolls are next up, followed by Foo Fighters who'll play 'Best Of You', 'All My Life', 'My Hero' and 'Everlong'.
There'll then be what is described as a "moment of darkness" (fear not it won't be the intro to 'I Believe In A Thing Called Love'), before the shows final act, a set from Madonna which is said to feature an appearance from T in the Park withdrawals Gogol Bordello.
The Live Earth concert will also feature a number of films, as well as two appearances from organizer Al Gore.