John Mayer has never kept his feelings to himself. Since splitting up with Jennifer Aniston soon after their Feb. 22 appearance at the Oscars, he's poured his heart out via his Twitter account. But now he's gone a step further. In his new song, "Heartbreak Warfare," which he debuted to thrilled fans aboard his four-night Mayercraft Carrier 2 cruise to Mexico, he appears to rail against her.

"If you want more love, why don't you say so?" he sings. "How come the only way you know how hard to hit me is to see how far I fall?"

For more on John's life after the breakup, pick up the latest issue of Life & Style, on newsstands now!

Photo Credit: Landov