'Orlando heard that there had been some flirting going on and he wasn’t exactly thrilled about it'
The supermodel – who is 11 years older than Justin - is said to have spent hours at a party with the teen heartthrob last year.
Photos of the pair cosying up together backstage at a Victoria’s Secret fashion show - after Miranda had walked the catwalk wearing a gem-encrusted corset – are said to have driven Miranda’s husband Orlando Bloom ‘wild.'
After the New York Fashion Week show, the pair partied together at a nearby hotel into the early hours with other models, according to the newspaper.
A source declared: ‘Orlando heard that there had been some flirting going on and he wasn’t exactly thrilled about it.
‘Miranda had always claimed that she was a fan of Justin’s music.’
The Bieber-loving model even taught her two-year-old son Flynn how to say ‘Bieber fever’ – much to his dad’s disgust:
‘She has taught her son how to say Bieber fever but it is supposed to have caused an issue,’ said the source.
Miranda, 30, and Orlando 36, announced their split on Friday after three years of marriage but were spotted arm in arm in Central Perk with their son at the weekend.
The couple - who were both without their wedding rings – appeared to be in good terms during the family day out.
The family are reportedly still living under the same roof in their New York home.