Chace Crawford as Nate Archibald, Ed Westwick as Chuck Bass, Blake Lively as Serena van der Woodsen, and Penn Badgley as Dan Humphrey in a dream sequence from the 100th episode of "Gossip Girl."

Chace Crawford as Nate Archibald, Ed Westwick as Chuck Bass, Blake Lively as Serena van der Woodsen, and Penn Badgley as Dan Humphrey in a dream sequence from the 100th episode of "Gossip Girl."