Remember that classic scene in Grease when Jan sings, "Brusha, brusha, brusha. Knock out decay germs fast!" in her most perfect beaver-esque voice? Well, for this week's Beauty Mark It challenge, we're doing something a little different.

Instead of makeup, hair products, or zit creams, this time we're talking teeth. Which toothpastes make your teeth sparking clean and which ones leave your pearly whites feeling not so pearly . . . or white?

Just follow the link above and review toothpaste to your heart's delight. I'll feature my favorites here next Tuesday. Oh, and if you're looking to get nostalgic, watch that famous clip from Grease when you