SPOILER ALERT: Taylor Swift's first song at tonight's Houston concert

HOUSTON (KTRK) -- Taylor Swift is in town for her performance tonight at Minute Maid Park.

And while her concert is still a few hours away, a source did reveal a few show secrets to ABC-13.

First off, you'll see the largest video screen ever used on tour behind the set. Also, the ramp will elevate, rise above the crowd and rotate like a helicopter.

And once she hits the stage, make sure to settle in. She's going to play a full two hours of songs!

And that leads us to the biggest secret of her show - what the first song will be. She'll open tonight's show with 'Welcome to New York.'

If you're going to the show, we want to see your photos. Email them to us at news@abc13.com.