Billboard Bits serves up the best bite-sized nuggets of music news and gossip.

Waka Flocka Flame Poses Naked for PETA

Brick Squad rapper Waka Flocka Flame is the latest celebrity to disrobe for a print ad by PETA. In the shot, Waka flexes a muscle and shows off his tattoos while the slogan "Ink, Not Mink" runs next to him. Oddly, the splattered blood of his "Flockaveli" album artwork is incorporated into the ad. ( NY Mag)

Selena Gomez Debuts New Song 'Who Says'

Selena Gomez stopped by Ryan Seacrest's radio show this morning to debut new track "Who Says," which will hit iTunes on Monday (Mar. 14). The pop singer alluded to her new relationship with Justin Bieber and the rabid backlash from Beliebers as the reason for the new release: "Twitter and Facebook are really negative for me," she said. "I feel like my fans need the song right now." ( Ryan Seacrest)

Lily Allen Discusses Eating Disorder in Documentary

In a new U.K.-produced documentary titled "Lily Allen: Riches to Rags," the British pop singer opens up about her struggle with bulimia that led to an incredible weight loss. "I used to vomit after meals," she said. "It's not something I'm proud of.  But, I tell you what, a lot of people came up to me telling me how great I looked and I'd be on the cover of every magazine." ( E!)

Mariah Carey's Dogs May Not Take Kindly to New Twins

Mariah Carey and Nick Cannon's trio of Jack Russell terriers may have some trouble adjusting the couple's new family additions when the singer gives birth to twins later this year, according to "The Jack Russell Terrier" author Catherine Romaine Brown. "Jack Russells can be quite possessive about those they love, wanting to guard them from children and even other pets," says Romaine Brown. ( PopEater)

Garbage Finishing Up New Album

Shirley Manson, lead singer of alt-rock group Garbage, has hinted in a Facebook note that the band may be finishing up their follow-up to 2005's "Bleed Like Me." "Back in the studio as of yesterday with the boys... We are getting up a nice head of steam as we really start to hone in and select tracks for the final collection... Dare I suggest we will have something finished by the summer?!?!?!?!" Manson wrote last week. ( Shirley Manson's Facebook)

Neil Young Sets Spring Tour Dates

Neil Young will continue supporting his last full-length, "Le Noise," with a 10-city U.S. spring tour, which kicks off in Durham, N.C. on April 15. One month after the tour wraps, Young will play as part of Buffalo Springfield at Bonnaroo. ( Rolling Stone)

(Reporting by Jason Lipshutz)