HEIDI KLUM has revealed how she taps into her inner sexiness on modelling shoots: it's all down to her husband, Seal.

The couple may have been together for five years and be bringing up three children together but they have one of the strongest marriages in celebrity - and just thinking of the singer gets Klum in the right frame of mind for sex, even when she's in front of the camera, she admits.

"I just have to think about my husband. Dressed, undressed, in the shower, wherever," she tells CONTACTMUSIC.COM. "He's always sexy. He always makes me feel sexy. He spreads his sexiness. I'm really lucky!"