JUSTIN Bieber is said to be "jealous" of his ex Selena Gomez's growing closeness to bisexual model Cara Delevingne.
The new best pals have been hanging out A LOT recently, going on holiday together, shopping - even showering.
And while their relationship is strictly platonic, it is Cara that Justin is reported to be most irritated by.
The 20-year-old pop star is said to have taken to calling her in the early hours of the morning.
A source told the Daily Mirror: "Justin has called Cara on more than one occasion, wanting to know what's going on.
"It's been clear that he's had a drink beforehand, too."
Matters won't be helped by the fact that Cara's acting career is blossoming.
The supermodel has just won the role of a mermaid in a remake of Peter Pan.
21-year-old Cara recently split up with actress Michelle Rodriguez, while Selena has been linked with Italian businessman Tommy Chiabra.
Sounds messy.
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