The newest rumor about Jelena's breakup is that Justin cheated on Selena with none other than Rihanna!

Here's what Life & Style's story says:

“It has devastated her. 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...[now] Selena thinks maybe they’ve been hooking up all along.”

The source added “Justin would never admit to it; he would never tell anyone he messed around with Rihanna.”

Wow, what a crazy rumor!

But it's not true.

Justin's rep totally denies it. When GossipCop asked Rihanna's rep for the truth, her rep laughed before saying it was completely, 100% made-up.

Phew! Although to be honest, we can't really see Justin being Rihanna's type anyway....especially because he was 16 when the 'source' says this happened! 

Sources: Life & Style, GossipCop