Blake Lively
XOXO! The Gossip Girl alum and "Wildest Dreams" singer both stunned in all-black ensembles while celebrating Taylor Swift's birthday in New York Dec. 13.
Jack Antonoff
We know all too well that Taylor's close friend would be front and center for her 34th birthday.
Zoë Kravitz
The High Fidelity star was among those who stepped out to celebrate her BFF's birthday.