422 The Wrong Goodbye

Season four wraps up with an explosive finale, including the return of Georgina Sparks and Constance Billard mean girls Kati and Is, a cameo by "Gossip Girl" author Cecily von Ziegesar, a performance by Airborne Toxic Event and, oh yeah, a few very juicy cliffhangers.

The Airborne Toxic Event - All For A Woman

The Airborne Toxic Event - Changing

The Duke Spirit - Cherry Tree

Badly Drawn Boy - In Safe Hands

Oh Land - Perfection

Adele - Rolling In The Deep

The Pierces - Space + Time

Figurines - The Great Unknown

XOXO

421 Shattered Bass

Charlie is finally starting to feel less like a fish-out-of-water with Serena and her friends, but complications present themselves when Charlie is invited to attend the Constance Billard alumni fundraiser. On the road to "happily ever after," Blair finds herself torn between the men in her life. Jack Bass' return to the Upper East Side sets off a chain of events that could end up destroying Chuck and those closest to him.

The Kills - Heart Is A Beating Drum

Squeak E. Clean - Mon Amour

Tapes 'n Tapes - One in the World

Cold War Kids - Sensitive Kid

Peanut Butter Lovesicle - State of I

Lykke Li - Youth Knows No Pain

Daniel May / MasterSource - Drinks On The House

XOXO

420 The Princess And The Frog

Blair's dreams appear to be coming true, but Serena threatens to jeopardize it all by dredging up Blair's past. Charlie befriends Vanessa, who may or may not have a hidden agenda. Nate is torn between his relationship with Raina and a truth he must keep hidden out of loyalty to Chuck

Stella Project - Aeroplane

Sam Jaffe - Cross

Les Bellas - Drown

Nicki Minaj - Fly

Bright Eyes - Ladder Song

Michael Mazochi - Lonely Key

Oh Land - Wolf & I

Mozart - Serenade In G, K. 525 'Eine Kleine Nachtmusik' - 3. Menuetto (Allegretto)

XOXO