Gossip Girl -- Penne for Your Thoughts

Posted Jan 7th 2009 12:22PM by TMZ Staff

Spotted: Blair Waldorf, aka Leighton Meester, defecting from the all-too-popular skinny girl diet of cigarettes and gum to carb up on a plate of Dorota's homemade pasta.

Good for her, but you know what they say about once on the lips ... XOXO.