Did Justin Bieber hook up with Rihanna while dating Selena Gomez?

justin-bieber-rihanna-hooked-up-nba-all-star-game.jpgThe latest rumor swirling around the infamous breakup between Justin Bieber and Selena Gomez is that Bieber cheated on Gomez with R&B singer Rihanna two years ago.

A supposed friend of Selena and Justin's tells Life & Style, "It has devastated [Selena]. It really cut her 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."

The friend says Bieber and Rihanna were flirting at a basketball game, which was actually the 2011 NBA All-Star Game in Los Angeles on Feb. 20, 2011. They certainly did sit next to each other courtside, as you can see in the above photo.

This friend says that now Selena wonders if Bieber and Rihanna were "hooking up all along."

A second source says that Bieber and Rihanna, while filming the 2012 Victoria's Secret Fashion Show, would "sneak away" to the Hotel Giraffe, with hotel staff blocking off an entire floor for them. The two are pictured performing at the show below.

A representative for Bieber denies that anything physical happened with Rihanna, though the friend of Bieber and Gomez says, "Justin would never admit to it; he would never tell anyone he messed around with Rihanna."

Hmm. What do you think, fans? Does any of it ring true? Or is it just gossip?

PS: If it is true, Bieber was only 16 at the time he supposedly hooked up with Rihanna, while Rihanna was 23.

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Photo/Video credit: Getty Images