Gossip Girl Quiz: Who Said It - Serena Van Der Woodsen Or Dan Humphrey?

Gossip Girl Serena
The CW

11. “The Hardest Thing Is Watching Someone You Love, Love Someone Else.”

Serena Van Der Woodsen

Dan Humphrey
Contributor

Aimee Klapisch hasn't written a bio just yet, but if they had... it would appear here.