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Plunging dresses have been a hot red-carpet trend for a while now, but two stars still managed to shock in their ultra-revealing looks Thursday night.

Eva Longoria wowed in an eye-popping black Cushnie et Ochs design at an event for her charity, The Eva Longoria Foundation, sponsored by Vanity Fair and Chrysler in Hollywood. She paired the daring look with black satin Brian Atwood pumps, dramatic eye makeup and a glamorous updo.

PHOTOS: Eva's smokin' hot style

"I know this doesn't look comfortable, but it is. I'm double-sticked to hell," the actress, 36, joked to reporters at the party.

LeAnn Rimes stepped out in an equally racy white Tom Ford dress that exposed her entire chest at the Hollywood Domino Gala and Tournament.

PHOTOS: LeAnn's scary slim down

"I love Tom Ford and I need Tom Ford, that's all I have to say," the 29-year-old singer replied when asked about her ensemble.