Posted October 2, 201014 yr Travie McCoy doesn't care that Katy sings about his prescription pill addiction on her song "Circle the Drain", or so he says. "I heard that she's put out a song that's about me or about some old habits or whatever," McCoy tells MTV. "[And]I look at it like this: I'm just stoked that she finally has a song with some substance on her record. Good job." Ouch. "Circle the Drain" sounds like a thinly-veiled attack on her Katy's ex-boyfriend. The two musicians dated a few years ago before the "Billionaire" singer went to rehab. In the song, Katy sings: "Wanna be your lover, not your f***ing mother. You think you're so rock and roll, but you're really just a joke. Had the world in the palm of your hands, but you f***ing choked."