What a bummer, dude! Justin Bieber flew his buddies to London to celebrate his 19th birthday at Cirque du Soir nightclub. Too bad they left the club after only an hour! He tweeted "worst birthday" then got McDonald's and chilled back at the hotel with his bros.

The club says they had to kick 'em out 'cause Justin had 14-year-old Jaden Smith in his crew and obviously couldn't let him in. But Justin told his side on his Intagram and bashed the club:

Damn! This story could honestly be true either way, but why is Will Smith letting his kid party with Justin Bieber???