Justin Bieber and Rihanna? Had a fling? We know, it sounds ridiculous. And apparently, it is, since sources have shot down the rumor that Biebs and RiRi got it on in 2011, eventually causing the demise of his relationship with Selena Gomez. Bieber and Rihanna are just friends and she looks at him like a little bro and nothing more.

A source told Hollywood Life "hell no" when asked if the two singers ever hooked up. Yeah, that sounds about right, since Ri is a bit too old for The Biebs. She'll turn 25 on Feb. 20 and he'll be 19 on March 1. There is a six-year age difference between 'em and if they hooked up two years ago, that'd make Ri a cradle robber, since he'd have been 17 to her 23.

The insider continued, "It’s crazy that people think this could be true. They are just friends. Rihanna looks at Justin like a little brother and she gives him advice. They’ve partied together but have never hooked up. This is crazy."

This is all speculation that stems from a Life & Style story that said that Biebs got together with Ri early on in his relationship with Gomez. That story claimed, "It really cut like a knife because it happened in February 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 story alleges that the couple also had trysts at the Four Seasons hotel in Beverly Hills (his stomping grounds) and at the Victoria's Secret Fashion Show.

If anything, RiRi is just looking out for him. An insider said, "It’s crazy that people think they’re hooking up because he’s actually been calling her up to get advice on what to do [with Selena]."

Maybe Ri would change her tune if she saw how sensuously The Biebs can kiss, like when he made out with the mannequin on 'Jimmy Fallon.'

Watch the Justin Bieber 'Boyfriend' Video