It's lights, camera, action on this week's Gossip Girl as Hilary Duff and Tyra Banks finally arrive on the scene. Both playing the obvious choice—movie stars—with Serena (Blake Lively) becoming entangled with every publicist's nightmare (the supermodel as a big-screen diva), while Hil plays the sweet and longing-for-a-normal-life celeb, Olivia, who falls for the oh-so-ordinary Dan (Penn Badgley). Plus, what the heck are Chuck (Ed Westwick) and Little J (Tayor Momsen) doing together, and why is former Queen B (Leighton Meester) reliving her glory days at Constance Billiard? Want more? See five additional clips after the jump.
Catch Gossip Girl Monday's at 9 p.m. on The CW.