JBieber111612_01_230.jpgJustin Bieber sure was pumped to celebrate his 19th birthday in England but it seems as if the pop star's special day hit a snag.

"Gonna be fun tonight. Thanks to everyone for all the birthday wishes. 19!" the Boyfriend tweeted yesterday. Bieber held a circus-themed birthday bash at London's Cirque du Soir last night with guests including British singer Ella-Paige Roberts Clarke and Jaden Smith, but the fun didn't last long.

Bieber's team and the venue's security staff got into a slight scuffle over the entry of Smith, Will Smith's son, who was 14 and not old enough to enter the club scene.

Following the ordeal, the pop star took to his Twitter account once again to voice his displeasure with two words: "Worst birthday."

At only 19, we're positive Bieber's bound to bounce back from this one!