Anderson Cooper isn't afraid of sharing a sexy selfie ... of someone else!

The CNN journalist tweeted a topless photo of his friend and New Year's Eve co-host Kathy Griffin on Monday, joking that the comedienne "just sent me this photo of her outfit for New Year's Eve. She's kidding, right? Please tell me she is."

Kathy might be a little chilly tonight in New York City's Times Square in this ensemble!

The long-time friends have been co-hosting CNN's annual special since 2007, and Griffin has always found a way to make Cooper uncomfortable.

Back in 2011, the comedienne kissed Anderson on the lips and joked about watching his "balls drop" at midnight.

Well, she seems to be starting the pranks early this year!