Clevver News VIDEO:Justin Bieber Parties with Diddy, Kourtney Kardashian & Joe Jonas at 22nd Birthday Bash The Biebs doesn’t officially celebrate his birthday until March 1st, but that didn’t stop him throwing a huge party on Saturday, filling up an entire Bel Air mansion with famous friends such as Kourtney Kardashian, Hilary Baldwin, Joe Jonas, and P. Diddy, who gave Justin a “Bad Boy” letterman jacket as his birthday gift. You can see him trying on the jacket in this Instagram snap, in which he’s also shirtless…Lookin’ good, Biebs! Attending guests used the hashtag #JB22 to share their pics from the night, and it looks like everybody, especially Justin himself, had a great time. Well it looks like my invite must have gotten lost in the mail. Again. For like, the 5th year in a row. It’s cool, I’m fine with it. I’m sure it’ll come through next year. So what do you guys think about Bieber’s early birthday celebrations? Think 22 is gonna look good on him? Get the conversation going in the comments and after that be sure to click here for our Debatable episode all about who the most underrated pop stars are. It’s safe to say Justin is not on that list. Thanks for hanging out with me, I’m your host xxxx xxxxxx and I’ll see you next time!