The "Mean" singer nabbed the Entertainer of the Year award for the second year in a row.
So what kind of Sin City partying did Swift get into after the big show? Read on to find out…
Swift changed out of her gorgeous J. Mendel gown and hit the Bellagio hotel's Yellowtail Japanese restaurant for dinner with family and friends.
Wearing a black skirt and flats, the country cutie—and her group of 12—arrived at the eatery after 9 p.m. and headed to private outside veranda. After a leisurely dinner and a champagne toast, the restaurant gifted Swift with a custom pair of chopsticks with her name on them.
But Swift wasn't the only boldfaced name out and about in Sin City last night…
Kenny Chesney and Ashton Kutcher hit Ghostbar inside the Palms Casino Resort with friends where they enjoyed Grey Goose and Crown Royal at two VIP tables.
Fergie celebrated her 37th birthday with a Voli vodka-sponsored bash at 1 OAK nightclub.
Sean "Diddy" Combs hosted a private Cîroc event at the SLS Hotel in Beverly Hills where he mixed and mingled with friends and media members.
New Girl's Bryan Greenberg sang a cover of the Black Keys' "Lonely Boy" for celeb guests like Adrian Grenier, Derek Hough and Maksim Chmerkovskiy at the Sayers Club in Hollywood for Jason Scoppa's Sayers Sessions music series.
Gerard Butler worked out at the Equinox gym in West Hollywood.
Ashley Tisdale sipped on Activate water while leaving the Millennium dance studio in L.A.
Over in NYC, new Jets quarterback Tim Tebow had dinner at Philippe Chow New York.
In Australia, Kellan Lutz and girlfriend Sharni Vinson danced the night away at the opening party for Marquee the Star in Sydney.
—Additional reporting by Melanie Bromley and Claudia Rosenbaum