Chelsea Handler Back at It With Sexy Skiing Shots for fiftieth Bday!

Chelsea Handler is literally sliding into her 50th bday … while skiing the slopes and showing off her amazing bod in a sexy red bikini!

The comedian and author of ‘I’ll Have What She’s Having’ — who’s never at a loss for words — is looking fitter than ever as she zooms down a snowy summit with a couple of ski poles to help her navigate some of those tight turns to ring in The Big 5-0.

And Chelsea couldn’t be happier … she’s grinning from ear to ear in this series of hot pics on the cold mountain peaks.

And the fun doesn’t stop there … Chelsea rides on a snowmobile, smokes a joint, and plays with a furry black dog.