God, I hope this is true, because if it is Chris Brown is going to carve up Justin Bieber like a foreskin at a Bris. (See all previous posts about Chris Brown.) From Life & Style:

Life & Style can exclusively reveal the reason Selena Gomez broke up with Justin Bieber after two years of dating: Selena found out that Justin had cheated on her in the early stages of their relationship — withRihanna.

“It has devastated her,” a friend of Selena and Justin’s reveals in the new issue of Life & Style. “It really cut like a knife because it happened in February of 2011, when Selena and Justin had been dating for months and were falling in love. It’s caused Selena to question their entire relationship.”

After flirting at a basketball game in LA on Feb. 20, 2011, the friend tellsLife & Style that he and Rihanna hooked up…

An insider reveals that they spent time together in NYC while taping the Victoria’s Secret Fashion Show in November 2012. “During breaks, they’d sneak away to the Hotel Giraffe,” the source tells Life & Style. “They were alone — their security made sure of it. Hotel staff blocked off the entire floor for them.”

A rep for Justin denies anything physical happened with the “S&M” singer. And the friend believes he’ll never confess and let down his fans. “Justin would never admit to it; he would never tell anyone he messed around with Rihanna.”

Since Rihanna’s type is more “murderous thug” than “scrawny, Canadian, white boy” (again, see all previous posts on Chris Brown) I’m gonna say this is bullshit. If anything, Justin probably went to Rihanna’s room where he took a puff off a blunt and promptly fell asleep on the couch, then Rihanna painted his nails while he was passed out. But just to be safe I’m working on a few names for the couple: Ri-Ber, Rihanner and Kip & Lafawnduh.