Lykke Li (more by Gretchen Robinette)
Lykke Li

U2 just surprised the world with a free new album, and now we're even more surprised to find out that Lykke Li is on there. She tweeted, "Pretty surreal to be duetting with Bono. Listen to these voodoo vibes Xx". Download the album for free at iTunes.

Catch Lykke Li on tour with Mapei, and at Radio City Music Hall this fall.