E! Online reports that Bieber and his crew had some  sort of disagreement with security at London club Cirque Du Soir last night, but  when some of his entourage – which reportedly included Will Smith’s son Jaden,  who’s just 14 -- were too young to get in, Bieber picked up his posse and packed  it out.

According to an Us Weekly source, Bieber left the club  because Smith couldn’t get in. "They could have stayed if Jaden left, but Justin  wanted to be loyal to his good friend,” the mag’s source said. Splash News,  which photographed the singer, claims that Bieber only stayed at the club for  five minutes – entering at 2 a.m. and leaving at 2:05. The photo agency says  that he then headed to McDonald’s in Earls Court before returning to his hotel.