Nick Carter's ex-girlfriend Willa Ford has quit making music to concentrate on her career as a model and boxer.

The pretty blonde, who bares all in the new issue of men's magazine Playboy, has turned her back on her music career because it became "too corporate" for her.

She says, "Music became this corporate world where you have to compromise everything, and I'm uncontrollable.

"I was recording in New York and I got in a cab, called home and said, 'I'm finished. I'm not doing this anymore.'

"I had so much more fun taking my clothes off for Playboy than I ever had sitting in a studio writing a song."