Heidi Klums "Great Knockers" Commercial

The supermodel can be seen playing with her breasts in the new TV commercial for the Victoria's Secret Fashion Show.

In the 30 second clip, the 34-year-old blonde - clad only in a plain black bra - fondles and 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..."

Heidi then grabs her chest and makes a machine gun sound as she aims her breasts left and right, in the manner of a fembot killer robot from the 'Austin Powers' films, who could fire bullets from their breasts.

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

The Victoria's Secret Fashion Show airs on December 4.