Pic: Justin Bieber smokes pot after Selena Gomez breakup

Justin Bieber and Selena Gomez split up again over the holidays, after a romantic vacation in Mexico turned sour. "Their time in Mexico was much of the same for them; constant arguments and bickering," a friend told Radar. "This might really be it for the two of them. They're over going back and forth and all the fighting and reconciling. They're finally realizing that no matter how much they try to make it work, it won't right now." Unlike last time they split, though, it looks like Biebs wasn't mourning and begging for her to take him back. He was photographed at a party in an Orange County hotel room this week... smoking a blunt, as you can see from the TMZ photo above. Sources tell the site that Bieber's buddy Lil Twist (the rapper who was driving Bieber's car when a paparazzo was killed last week) was rolling the blunts, and that the room was full of marijuana smoke. So much for Biebs' clean-cut image? Word is, most of the scintillating conversation at the party was about how tired Bieber was after staying up too late, and about getting their hands on some fast food. (Fascinating stuff, really.) A girl who is not Gomez spent the night in Biebs' hotel room.