Demi Lovato celebrates turning eighteen by getting in a catfight and going to rehab. Cher keeps messing up her transgender son's pronouns. Ricky Martin cried when he came out. Kim Kardashian launches her music career. Tuesday gossip cometh.

Last night 18-year-old Disney triple-threat Demi Lovato quit her concert tour with the Jonas Brothers to enter rehab for undisclosed "emotional and physical issues." So what's the real reason? (Other than "being a child star.") TMZ says a "physical altercation with a female member" of the tour was a "catalyst" in Demi's realization that she needed help. People reports Demi "was bullied in school. She fought through eating disorders and has struggled with cutting." Last time the cutting rumors came up, Demi's publicist blamed silly bandz. Demi once said she chose homeschooling to escape her junior high tormenters, and once used her blog to accuse other blogs of bullying: "Sometimes [bullying] doesn't just end in high school. Sometimes I get online and read blogs (which I probably shouldn't if I can't handle it) and read the horrible things that people say in comments […] and it can really take a toll on you." So, uh, watch what you say in the comments on this post? [People, Us, MTV, Previously, Top image via Getty, magazine scan via Star]

Sidenote: Did you know Demi's little sister is Madison De La Garza, who plays Eva Longoria's daughter on Desperate Housewives? Given Demi's alleged eating disorder, kinda awkward that Madison's chubbiness is a major plot point. [image via Bauer-Griffin]

  • Kim Kardashian is recording an album with Christina Milian ex and "Single Ladies" producer The-Dream. I can't even comment on this one. [TMZ]
  • Slash was divorcing his wife of nine years, but then he called it off. He's back together with bra-named wife Perla, hooray! [People]
  • Several hooker- and cocaine-laced rampages later, Charlie Sheen and Brooke Mueller are finally divorcing. They signed a separation settlement back in May, but didn't get around to filing the actual divorce papers until now. Apparently Brooke forced Charlie's hand by signing on to do a reality show; to keep their divorce out of the show, Charlie had to file for it before filming started. [TMZ, TMZ]
  • Alanis Morissette wore a bikini in Los Cabos, and whoa, that fetus is really growing, big time. [People]
  • Apparently Cher is having trouble adjusting to son Chaz Bono's gender transition. She recently referred to Chaz as a "girl" in an interview: "Well, she's a very smart girl—boy! This is where I get into trouble. My pronouns are [bleeped]. I still don't remember to call her 'him.'" Pronoun slip ups: If they can happen to the gay icon mother of a transgender man, they can happen to anyone. [VF via P6]
  • California's marijuana dispensaries have a new strain of weed: The Mel Gibson, which is odd, because "Mel Gibson" is probably the last thing you want to feel like when kicking back with a toke. "Once you smke it, it's supposed to make you go ballistic." Is it laced with methamphetamines or something? [TMZ]
  • T.I. surrendered himself to a 11-month prison sentence for his drug-related probation violation yesterday. He is inmate #59458-019 and his shower is communal. [TMZ]
  • After hitting "send" on the mass email announcing he was coming out of the closet, Ricky Martin "started crying like a baby." He has an interview airing on Oprah today where he'll talk about it: "I couldn't take it anymore. It was too painful. But I guess the most important thing is my children ... When I was holding them in my arms I was like, 'What, am I gonna teach them how to lie?'" [People]
  • AnnaLynne McCord and Kellan Lutz are officially over, thereby ending the most confusingly sexy relationship in Hollywood. [E!]
  • Eddie Cibrian and LeAnn Rimes faked everyone out by tweeting a picture where it looked like Eddie was proposing to LeAnn. As if they would ever make such a special moment public! What do you take them for, Kardashians? Their publicist said the pose was "just part of the Halloween fun." Since Eddie and LeAnn fell in love while married to other people, marriage is the scariest thing they know. [People]