P Diddy Challenges J-Lo to 'Smell Off'

P Diddy is set to challenge his ex-girlfriend Jennifer Lopez to a 'smell-off' because he thinks he's a better judge of women's scent than she is.

The rap mogul-turned-designer will launch the challenge when he appears on celebrity US chef Rachael Ray's daily TV show to promote his new perfume, Unforgettable Woman.

He says, "I am going to challenge my female counterparts, from J.Lo, Mariah Carey, Sarah Jessica Parker to Gwen Stefani that my fragrance is better than theirs."

"I am a man, and I know how a woman should smell."