Hilary Duff | Gossip Girl

• Genre: Teen drama, Soap opera
• Based on: Gossip Girl by Cecily von Ziegesar
• Developed by: Josh Schwartz, Stephanie Savage
• Showrunners: Josh Schwartz (seasons 1–3), Stephanie Savage (seasons 1–3 & 6), Joshua Safran (seasons 4–5)
• Starring: Blake Lively, Leighton Meester, Penn Badgley, Chace Crawford, Taylor Momsen, Ed Westwick, Kelly Rutherford, Matthew Settle, Jessica Szohr, Kaylee DeFer
• Narrated by: Kristen Bell
• Opening theme: "Steps of the Met" by Transcenders
• No. of seasons: 6
• No. of episodes: 121
• Executive producers: Josh Schwartz, Stephanie Savage, Donovan Shavis, Bob Levy, Leslie Morgenstein, John Stephens, Joshua Safran, Sara Goodman
• Production locations: New York City (Manhattan and Brooklyn), Long Island East End
• Running time: 39–44 minutes
• Production companies: Warner Bros. Television, Alloy Entertainment, College Hill Pictures, Inc., CBS Television Studios, Fake Empire
• Network: The CW
• Release: September 19, 2007 – December 17, 2012

The series focuses on a group of privileged teenagers who attend a prestigious high school on the Upper East Side of Manhattan in New York City. Their private lives are constantly commented upon by an unknown blogger under the pseudonym "Gossip Girl". 

"Dan de Fleurette"

It is the first day of school at Constance Billard which means it is also time for Jenny to take her rightful place as the new Queen Bee. Unfortunately for Jenny, Blair is more than happy to intervene when news reaches her that she may be needed back at Constance. Meanwhile, Lily returns home to Rufus and her family to find that things are definitely not as she left them. A famous film actress, Olivia Burke (Hilary Duff), enrolls at NYU in hopes of having a somewhat normal college experience, and is assigned to be Vanessa's roommate. Tyra Banks appears as Ursula, an actress co-starring in Olivia's film and someone who Serena befriends when she is hired by Olivia's personal assistant for an upcoming film premiere.

"Enough About Eve"

Vanessa, hoping to finally win her difficult activist mother Gabriela's (Gina Torres) approval, desperately vies with Blair for the honor of delivering the freshman toast at NYU. Meanwhile, Dan invites Olivia to meet Rufus and Lily, which leads to all sorts of problems for the new couple. Elsewhere, Serena and Nate team up to help Carter win money at a poker table to free him from his arrangement with the Buckleys.

"How to Succeed in Bassness"

In need of publicity for the opening of his new Empire Hotel, Chuck decides to move up the hotel's nightclub opening and enlists Serena's help to get the word out to her celebrity clients. Feeling left out of the planning, Blair attempts to win Chuck's approval by secretly helping him with a problem concerning the opening night. Meanwhile, Dan is unnerved when he finally watches one of Olivia's infamous sex scenes with co-star and real-life boyfriend at the time, Patrick Roberts (Simon Miller) in one of her films. Jenny is forced to choose between her relationship with Eric and her new role as Queen Bee of Constance Billiard. Elsewhere, Rufus gets Lily into the Halloween spirit by taking her out to a costume party. Albert Hammond Jr. makes a short cameo as himself.

"The Grandfather: Part II"

Olivia says something she regrets during her appearance on Jimmy Fallon's talk show and tries to keep Dan from finding out. With election day around the corner, Nate suspects his grandfather will stop at nothing to get his cousin Tripp (Aaron Tveit) elected to congress. In the midst of another feud with Serena, Blair befriends a new "it" girl and takes her to an election night party at Chuck's hotel, hoping to make Serena jealous. Meanwhile, Vanessa becomes upset with Nate because of his schemes during the election.

"They Shoot Humphreys, Don't They?"

Not satisfied with just being Queen of Constance Billard, Jenny sets her sights on becoming the Queen of all the Upper East Side by landing the hottest escort for cotillion. Meanwhile, Nate and Chuck plot to help Serena and Blair repair their damaged friendship by intentionally trapping them inside an elevator. Dan is upset when Olivia contemplates leaving school for a film project, so he and Vanessa take her out on the town with a list of all the things that a university would make up—including a threesome. Blair and Eric plan to dethrone Jenny at cotillion. Blair enlists Kira Abernathy (Sarah Steele) to take her down and become the new queen of Constance Billard. Jonathan, upset at Eric's scheming with Blair, breaks up with him. In this episode, Meester's song "Somebody to Love" featuring Robin Thicke is introduced.

"The Last Days of Disco Stick"

Hoping to impress the elitist theater kids at NYU, Blair sets her sights on landing a private concert with the hottest musical performer of the year, Lady Gaga. Dan and Olivia sign up to write and star in a school play, based on an idea by Blair and directed by Vanessa which leads to more quarreling between all involved. With Blair out of the picture, Serena turns to Nate to help her get through a difficult situation when she begins falling for Tripp despite the fact that is he still married. As a favor to Chuck, Jenny agrees to hang out with Damien (Kevin Zegers), the son of an ambassador who is staying at Chuck's hotel, but the experience proves to be a lot more intriguing than she expected.