Talking to Cosmopolitan magazine and reported by Entertainmentwise, the 'Domino' hitmaker said that she was "really close" with Ellie Goulding because she's "one of the people who can understand what my life is like".
She's also pals with Jason Derulo ("I take the piss out of him a lot!"), Tinie Tempah, Fearne Cotton (obviously) and Serious Music Fan Dermot O'Leary.
But what of her 'normal' friends? Apparently they always assume she's too busy to hang out.
"I've had friends who've dipped in and out of my life, who've said, 'I just didn't want to bother you'," she explains. "And I'm like, 'You're one of my best friends. You calling me is not bugging me'."