Grey's Anatomy Original Soundtrack Volume 4, the first new collection of music from and inspired by the hit ABC series in four years, features songs from an acclaimed array of artists, including Cee Lo Green, Lykke Li, Peter Bjorn and John, The National, The Boxer Rebellion, Delta Spirit, and Chop Shop/Atlantic s own The Republic Tigers. The album also includes the new, exclusive track "Heart On Fire" by British band Scars on 45.