The super model and her famous actor husband announced their separation last week and now there are reports that it was caused by her admiration for the Biebs.
A source told Britain's Sunday People, that 30-year-old Miranda is a pretty big "fan" of the 19-year-old singer, and that didn't sit well with her husband.
"Miranda had always claimed that she was a fan of Justin's music," the newspaper source said.
"She has taught her son how to say 'Bieber Fever' but it is supposed to have caused an issue."
What's even more interesting is that Miranda partied with the singer after the Victoria's Secret fashion show last year. We all know the effect Bieber has on those girls (ahem, Barbara Palvin)!
"Orlando heard that there had been some flirting going on and he wasn't exactly thrilled about it," the source added about Miranda and Justin's chemistry at the show.
Orlando and Miranda have been married since 2010 and have a 2-year-old son together.
Despite what they're going through right now, Miranda and Orlando remain on good terms. They were reportedly seen walking arm in arm in Manhattan on Saturday, with their son Flynn.
Do you think Justin really had anything to do with their split? Chime in!
Want More? Like us on Facebook
Gallery | Biggest Celeb Break-Ups of the Year!