Heidi Klum has given a new meaning to the word Thanksgiving.

The supermodel has appeared in a saucy new TV commercial for the Victoria's Secret Fashion Show where she can be visibly seen fondling with her breasts.

In the 30 second clip, the 34-year-old blonde - clad only in a plain black bra - jiggles her ample boobs as she sings, dances, yodels and announces "I've got great knockers!"

After explaining how her nipples stand to attention when it's cold, Heidi shouts: "You guys have no clue about boobs, and if you don't."

The commercial ends with Heidi grinning as she declares: "Great knockers, I loooove it!"

The Victoria's Secret Fashion Show airs in the U.S. on December 4.

In the meatime, enjoy some breast fondling, Heidi style...