We don’t know about you, but Justin Bieber is feeling 22. Justin, who starts his world tour in approximately ten days, spent Saturday night throwing a major party at his house in LA. Diddy was there, as a friend but also mainly to pimp his Ciroc vodka, because apparently things have gotten that bad. There haven’t been any reports on how sloppy Justin got, but we’re hoping he left some Selena some good drunk voicemails. This might have been one of Justin’s last crazy nights for a while, because starting next week he’ll be on the road for six months. Then again, he’ll probably just get drunk and cancel some concerts if he feels like it. Happy birthday, Justin!