Kara DioGuardi On "Rich Girl": "I Didn't Write With Gwen"

Just Jared — Kara DioGuardi shows off her toned tummy on the cover of Women’s Health magazine’s April 2010 issue.

The 39-year-old American Idol judge and songwriter dished on the stories of songs she’s written or collaborated on. Check it:

On “Rich Girl”: “I didn’t write [this song] with Gwen. [Interscope Geffen A&M chairman] Jimmy Iovine gave me the track, and I hummed some melodies and scatted some words. She loved it and filled it in. I remember getting a call in my car: ‘Jimmy Iovine and Gwen Stefani on the line. Can you take the call?’ I practically drove off the road.”