Justin Bieber's ex-girlfriend Selena Gomez recently spent time with one of his good friends and when the Boyfriend found out, he reportedly got very upset.  

King Kevi visited Gomez's California home on April 4 but Bieber does not appreciate the relationship his friend has with his most recent ex. A source close to the situation explained what happened by telling Perez Hilton Kevi and Gomez are friends, and they were only together that night because there was a party with 15 or 20 other people in attendance.  

"They were hanging out smoking hookah with some buddies" but "Justin was pissed," the source said. "[Bieber] said, 'Yo, why were you kicking it with her? I thought you and I were homies.' He doesn't think they're hooking up but doesn't want his closest friends partying with her." 

A day after Kevi and Gomez were said to have spent time together, Bieber was photographed sporting a new haircut: shaved much shorter on the sides, longer on the top and swept to the side. The look debuted at a meet-and-greet with fans in Germany, where Bieber stopped as part of his Believe world tour. The side-swept look is a very different look from the 19-year-old's once signature hair flip that he came on the music scene with. He cut off the look in February 2011 and since then had sported a shorter, more cropped look before cutting it again recently. 

Bieber will perform at the 2013 Billboard Music Awards on May 19 and Gomez will perform the hit single from her upcoming album, Come and Get It, at the MTV Movie Awards on Sunday. 

Tags: Justin Bieber Selena Gomez