John Mayer releases his fourth studio album "Battle Studies"

Battle Studies is the fourth studio album by American rock musician John Mayer.

Released on November 17, 2009 by Columbia Records, the album was produced by Mayer and drummer Steve Jordan.

1. "Heartbreak Warfare" – 4:30
2. "All We Ever Do Is Say Goodbye" – 4:35
3. "Half of My Heart" (with Taylor Swift) – 4:10
4. "Who Says" – 2:56
5. "Perfectly Lonely" – 4:28
6. "Assassin" – 5:14
7. "Crossroads" (Robert Johnson cover inspired by Cream) – 2:29
8. "War of My Life" – 4:15
9. "Edge of Desire" – 5:32
10. "Do You Know Me" – 2:30
11. "Friends, Lovers or Nothing" – 5:59

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12. "I'm on Fire" (Bruce Springsteen cover) – 2:52