LEANNE RIMES A BAD BAD GIRL!

This is a video thanks to our friends at US Magazine!

Us Weekly has the exclusive video of LeAnn Rimes and Eddie Cibrian kissing, holding hands -- and even sucking on each other's fingers during a March 7 date at Mosun and Club M in Laguna Beach, California. Twenty-two seconds into the clip, Cibrian arrives at the restaurant and they walk in hand-in-hand. Then they're seated -- as seen in the center left of the frame -- and proceed to hold hands (36 seconds) and kiss (1:47). At the 2:10 mark, Rimes suggestively sucks on Cibrian's finger. They leave together shortly after.

Us Weekly has seen the $95 receipt for the dinner, as paid for by Cibrian on his credit card and signed by him.