PHOTOS: Taylor Swift revs up crowd at Formula 1

AUSTIN (KXAN) — Some people were at Circuit of the Americas Saturday for the Formula 1 race and some were there just for Taylor Swift. Some were there for both. By the time TSwift took the stage, reports indicate there were 100,000 people in the crowd.Welcome to @circuitamericas, @taylorswift13. What a crowd! pic.twitter.com/WVJSI6GeNR
— Formula 1 (@F1) October 23, 2016The incredible firework show ending the night during "Shake It Off"! #TaylorSwiftOnUSGP (@daddycoollouis) pic.twitte