AceShowbiz -

Gwyneth Paltrow is a rock star in a newly-revealed clip of "Glee". The "Iron Man" actress reprises her role as substitute teacher Holly Holliday and gives a sex education to the New Direction kids in a rock 'n roll set. She decks leather outfit, jamming to Joan Jett's song "Do You Wanna Touch Me (Oh Yeah)".

She breaks into a suggestive chair-dance sequence, unzipping her jacket to reveal her black bustier and ignoring Matthew Morrison's Will Schuester who silently shows her a "too much" note. "So just remember whenever you have sex with someone, you're having sex with everyone they've ever had sex with. And everybody's got a random," she said after the performance.

Gwyneth will return to "Glee" in an episode called "Sexy" which is airing March 8. Holly makes a comeback to fill in for the absent sex-education teacher. She joins forces with Mr. Schuester to teach the kids of New Directions the facts of life. Meanwhile, Emma heads up the Celibacy Club, and she and Dr. Carl (guest star John Stamos) address some issues in their personal life.