Completely Blairtastic

That would be season 4 episode 19 “Petty in Pink”

- Serena Van Der Woodsen

"I took a public bullet for you, let another rumor about me run rampant. The whole school heard, even Dan." - Serena Van Der Woodsen

"Like I said, I handle my business. Apparently Nate doesn't. They slept together just after we did. It's him you should be asking for help." - Chuck Bass

- Gossip Girl

Gossip Girl -> Season 1 Episode 13: "The Thin Line Between Chuck and Nate

"In case you're wondering, narc, I only took that key from the party to hide it that we wouldn't all get blamed. Including you." - Chuck Bass

"Don't think for a second these other kids aren't going to be looking out for themselves. You should do the same. Alright?" - Rufus Humphrey

"Ten thousand words describing how you came to be on school property after hours using alcohol and drugs where a fellow student almost died. In other words, what the hell is wrong with you?" - Headmistress Queller

"But if your whole future depends on you getting this grant for your documentary I really really think you should find a new subject." - Dan Humphrey

Gossip Girl -> Season 1 Episode 12: "School Lies"

"Hear those silver bells? It's Christmas time in the city. Some families actually do make the yuletide gay, managing to leave their troubles far away." - Gossip Girl

"Vanessa, I think I'd like to help with this little project. would you come and help me find another pair of scissors? It's so nice what you're doing for your friend Dan. Helping his girlfriend make his Christmas present. Serena is so grateful because she likes to see the best in people. Me? I like to see the truth." - Blair Waldorf