(Full) Synopsis: 3x09 "They Shoot Humphreys, Don't They?" 

Not satisfied with just being Queen of Constance Billard, Jenny (Taylor Momsen) sets her sights on becoming the Queen of all the Upper East Side by landing the hottest escort for Cotillion. Leighton Meester’s new single “Somebody to Love” (with Robin Thicke), is featured in the episode, along with a guest performance from all-girl rock band Plastiscines. Nate (Chace Crawford) and Chuck (Ed Westwick) plot to help Serena (Blake Lively) and Blair (Leighton Meester) repair their damaged friendship. Dan (Penn Badgley) is upset when Olivia (guest star Hilary Duff) contemplates leaving school for a movie project.