Momsen's old gig was pretty crummy. Photo: YouTube

We all know that Jenny Humphrey has some skeltons in her closet on "Gossip Girl," but who knew Taylor Momsen had an alternate past as well?

Our friends at PopEater are reporting that the grunge goodess -- who fronts the rock band Pretty Reckless and is the spokesperson for Madonna's Material Girl line -- was once an adorable toddler with chubby cheeks and affinity for breaded chicken!

Momsen filmed the commercial wearing pigtails and a yellow floral top. Not a single pair of hooker heels or massive amounts of eyeliner in sight. Whew!

She ends the too cute commercial by licking her fingers and exclaiming, "I'm going to be a Shake 'N Bake mom!" We'll see about that...