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Taylor Swift's brand new album, 1989 dropped Monday, and she celebrated with an iHeartRadio Secret Session!

[Buy 1989 on iTunes]

Taylor performed music from her brand new album on a rooftop in SoHo, and the performance was synced to the world-famous LED tower lights on the Empire State Building. 

Photo: Todd Owyoung for iHeartRadio

Taylor took the stage at dusk, where she addressed a rooftop full of fans she had handpicked to attend the final Secret Session of her campaign to share the new album, 1989, with fans across the world.

Taylor previously held album-listening sessions with fans in London, Nashville, Rhode Island, Los Angeles, and New York, and she was delighted that her #Swifties kept details about the album secret.

Taylor opened the show with the song that opens the album, which was perfectly fit to set the stage for her Secret Session under the light of the Empire State Building: " Welcome To New York."

She then performed three more tracks from the new album: "Out of the Woods," "Style" (which is believed to be about ex-boyfriend Harry Styles) and new single, "Blank Space."

Taylor performs "Blank Space"

Taylor closed the show with the #1 song at pop radio, as Taylor introduced it, smash hit "Shake It Off."

Taylor performs "Shake It Off"

The event aired live simultaneously on Yahoo! Live and on iHeartMedia CHR stations across the country, including Z100 in New York, as well as on iHeartRadio's Hit Nation

What did you think of the event? What was your favorite moment? Tweet your thoughts using #iHeartTaylor.

[RELATED: Celeb Reactions to Taylor Swift's 1989]

PHOTOS: Taylor Swift's 1989 Secret Session with iHeartRadio

Can't get enough Taylor? Hear her talk about the meaning from each track on 1989 below.

Watch Taylor's full performance of "Shake It Off" from the 2014 iHeartRadio Music Festival in Las Vegas below.

Photos: Getty Images