MONDAY, OCTOBER 5

"GOSSIP GIRL" � (9:00-10:00 p.m. ET)

"Dan De Fleurette" (TV-14) (HDTV)

JENNY BEGINS HER REIGN AS THE NEW QUEEN BEE / HILARY DUFF AND TYRA BANKS GUEST STAR � It's the first day of school at Constance Billard which means it's also time for Jenny (Taylor Momsen) to take her rightful place as the new Queen Bee. Unfortunately for Jenny, Blair (Leighton Meester) is more than happy to intervene when news reaches her that she may be needed back at Constance. Lily (Kelly Rutherford) returns home to Rufus (Matthew Settle) and her family to find that things are definitely not as she left them. A famous movie actress, Olivia Burke (guest star Hilary Duff), enrolls at NYU - and is assigned to be Vanessa's (Jessica Szohr) roommate - hoping for a somewhat normal college experience. Tyra Banks guest stars as Ursula, an actress co-starring in Olivia's movie and someone who Serena (Blake Lively) befriends. Penn Bagley, Chace Crawford and Ed Westwick also star. Mark Piznarski directed the episode written by John Stephens (#304).