It's opening day of sure-to-be-blockbuster film The Avengers, which brings together Marvel's mightiest heroes including Iron Man, Captain America, Thor, Black Widow, Hawkeye and the Hulk to save the world. Each of these heroes begins with their own history and agenda, but they unite their unique strengths to create an unbeatable force.
In the spirit of powerful team ups, we've created a Spotify playlist of 18 songs by rock & roll supergroups – bands that grew out of the whims, friendships and musical experimentation of multiple members of already-famous bands – from classic collaborations like Cream (Eric Clapton, Ginger Baker) and the Honeydrippers (Robert Plant, Jimmy Page, Jeff Beck, Nile Rodgers et al.), to current indie team-ups like The Dead Weather (Jack White, Alison Mosshart of the Kills) and Wild Flag (Carrie Brownstein and Janet Weiss of Sleater-Kinney, Mary Timony of Helium and Rebecca Cole of the Minders). Artists assemble!