A new report claims to get to the heart of the Selena Gomez and Justin Bieber break-up.
First, according to Radar Online sources, Selena and Justin actually split once before, back around the time Bieber filmed an episode of Punk'd with Miley Cyrus.
Why would that be a problem?
"Selena is repulsed by Miley!" this insider claims, adding that Justin going ahead with the show "didn't sit well" with his girlfriend.