Beyoncé, Jay Z & Justin Timberlake attend Taylor Swift's birthday party...

So much pop power in one room! But if anyone can pull off it off, it's going to be the almighty Taylor Swift, who turned 25! 

Beyoncé, Justin Timberlake, and Jay Z were three of many A-List musicians to hit up a Special Pizza Birthday party at Swift’s Tribeca Apartment late Friday night. Four sprinter vans full of guests arrived at the apartment, as well as lots of SUV’s and limos.

Before the guests arrived, at least 40 boxes of pizza were carried inside. Beyoncé and Jay Z reportedly left at around 4:50AM. I am MORE surprised at Jay Z attending a Taylor Swift birthday party. Since WHEN did they ever become friends? This teeny bopper party was clearly more important to him than Rihanna's very first 'Diamond Ball,' which everyone assumed he'd attend but didn't. Weird.