Star chefs in their underwear?!

Like hunks at a bachelor auction (from left): Michael Solomonov, Jeff Michaud, Jeff Benjamin and Marc Vetri. The 2012 Great Chefs Event at Urban Outfitters' HQ raised hundreds of thousands for Alex's Lemonade Stand Foundation.

Michael Solomonov of Zahav, Percy Street and Federal Donuts is famous for speaking his mind.

Now, the chef is going to show off his skivvies, and those of restaurataur Jeff Benjamin and chef Marc Vetri and Jeff Michaud.

At Tuesday night's Great Chefs Event - which Vetri and Benjamin organize to raise money for the Alex's Lemonade Stand Foundation and for the Vetri Foundatioon for Children - Solomonov was trying to pump up the action on a live auction item: a 21-course Vetri dinner for people with Shake Shack creators Danny Meyer and David Swinghamer.

The bidding was going fast and furious, and then Mike Solo told bidders that they'd cook and serve it in their underwear.

Two bidders deadlocked at $19,000 - and the guys agreed to do a dinner for each bidder.

A 5 day, 4 night gastro-tour of Piemonte, Italy, for six with Michaud and Vetri sold for $35,000.

The Great Chefs Event - which organizers say raised $1 million - also drew Bravo TV’s Tom Colicchio, Food Network Iron Chef Jose Garces, Original Iron Chef Masaharu Morimoto and Chef/Restaurateur Drew Nieporent and 1,200 guests at Urban Outfitters.