Single in the Summer!
John Mayer and Jennifer Aniston
Weeks after his March split from Aniston, Mayer debuted a new tune, titled "Heartbreak Warfare," on his five-day cruise for fans. Before performing the song, he told the 3,000 fans aboard the Mayercraft Carrier 2, "It's miserable being around someone who's negative." He then began singing the song, which includes such lyrics as: "If you want more love, why don't you say so?"