Heidi Klum steams up the screen in a new commercial for Carl's Jr. and Hardee's, set to debut later this month, by devouring a hefty burger in front of a bewildered young man. The supermodel, 39, dons a very revealing, low-cut little black dress in the sexy TV spot, in which she takes on a Mrs. Robinson-inspire role in The Graduate-style commercial. Her seduction tool of choice? A Jim Beam Bourbon burger that she bites into seductively as she plays up her famous curves. The mother-of-four isn't one to shy away from an opportunity to flaunt her figure, however. cr; usm