Kerr's 'flirting' with Bieber to blame for split?

THEIR split is still raw, but already theories are emerging about why Miranda Kerr and Orlando Bloom ended their marriage.

And Justin Bieber has found himself at the centre of the rumours.

Britain's Sunday People reported that the supermodel's friendship with the teen pop star is one of the many reasons why Kerr-Bloom went from happy families to Kerr-putt late last week.

She's a Belieber: Bieber ogles the Victoria's Secret supermodel Miranda Kerr on stage and back stage where the pair flirted away

Photos of the pair snuggling up after a Victoria's Secret fashion show last year have also emerged, with reports they spent several hours together at an after party and partied well on into the night.

Can you Beliebe it? The Australian beauty, who is 11 years older than Justin, reportedly spent hours with the Canadian singer at a showbiz party in New York nearly a year ago

The publication reports the pair were also seen "flirting" with each other.

Bloom is said to have been less than impressed with Kerr's fascination with Bieber and wasn't happy when he taught their two-year-old son to say "Bieber fever".

Despite the breakdown of their marriage, the pair emerged arm-in-arm and all smiles in Central Park yesterday on a day out with Flynn.

"Orlando heard that there had been some ­flirting ­going on and he wasn't exactly thrilled about it," a source told the UK publication.

"Miranda had always claimed that she was a fan of Justin's music.

"She has taught her son how to say Bieber fever but it is supposed to have caused an issue."

Despite the break-down of their marriage, the pair were all smiles out and about with their son Flynn in New York's Central Park yesterday.

However, both were without their wedding rings.