Michael Buble Exposed As Love Rat

Emily Blunt’s boyfriend Michael Buble has been branded a love rat by a blonde who claims to have been enjoying secret sex sessions with him behind the actress’s back.

Tiffany Bromley, 28, says she has been bedding the Canadian singer on and off for the past decade – and even romped in the flat he shares with the star of The Devil Wears Prada.

Bromley tells the Globe: "Michael is a cheater and a rat. We've made mad, passionate love a couple of times since he and Emily have been together. The last time was August 17 in the apartment they share in Vancouver."

The blonde rates Buble "an 11 out of 10" in bed – and says he once suggested a threesome.

She adds: "I told him, 'No way!' He said, 'Don't knock it till you've tried it. You don't know what you're missing.'"

Bromley claims that she hasn’t seen Buble since she took cameraphone photos of him sleeping and then took off wearing one of his designer shirts.