Heartbreaking moment backstage with @iamwill, courtesy of our friend @clarkdennis (the photo, not the moment!)

Look who we found backstage @ #Concert4NYC? @elvisduran, @rosannascotto and @mark_sanchez. J-E-T-S Jets Jets JETS!

The Black Eyed Peas #Concert4NYC stage all covered up, waiting for the weather to pass. Let's get it started!

When she was a little gaga, @LadyGaga listened to @ElvisDuran every morning! Love her. Love #BornThisWayFriday

Here's your first look at the cover of @britneyspears' new single!!

Have you seen @justinbieber's red-hot Vanity Fair cover? What do you think?

One of our fave photos of the night - @enrique305! So many more at http://Z100.com/l/Z100jb #ZJBatMSG

Yeah, @justinbieber makes ya jump, jump! #ZJBatMSG

Z100's Jingle Ball, starring @katyperry as the Nutcracker #ZJBatMSG

Side stage VIP lounge is THE place to watch the show - Tommy Page and Z100's @tompoleman & @zsharond during Buble's set

Backstage: Ms. @katyperry sweetly poses with lucky fans #ZJBatMSG

Helllooooo @enrique305! #ZJBatMSG

@yelyahwilliams rocks the sold-out Z100's Jingle Ball crowd @paramore #ZJBatMSG

The famous Z100's Jingle Ball rotating stage in action #ZJBatMSG

It's @brunomars behind the drums! #ZJBatMSG

It's warmer now, but Bobby Ray's still wearing the hat @bobatl #ZJBatMSG

Backstage: @jaysean and @garrettvo chat n'chill in the H&M Artist Gift Lounge #ZJBatMSG

Good times in the H&M Artist Gift Lounge with @paramore and @jjonz100! #ZJBatMSG @yelyahwilliams

Team Z100.com backstage in a special room built to house insane pyro for German band #Rammstein's show tmrw #ZJBatMSG

@official_flo with one of his littlest fans. Paparazzi tryna make him pose!