Rapper Snoop Dogg is set to join to THE Pussycat Dolls on their upcoming single.

The DROP IT LIKE IT'S HOT superstar was so impressed by their Santa Baby collaboration at December's (05) Radio Music Awards, he's agreed to appear on sexy new song BUTTONS.

Lead Pussycat Nicole Scherzinger confirms to MTV, "It's the D-O-double-G, baby!"