The Billboard Music Awards went down in Las Vegas on Sunday, and music's biggest and brightest stars made their way to the MGM Grand Garden Arena for all the fun. Before heading inside to watch Chrissy Teigen and Ludacris host the big show, stars like Jennifer Lopez [1], Britney Spears [2], and Kendall and Kylie Jenner hit the red carpet [3] to pose for photos; Taylor Swift [4] also arrived with her posse of girlfriends [5] before debuting the video for "Bad Blood" at the beginning of the show. Keep reading to see all the celebrities who popped up at the Billboard Music Awards!

Jennifer Lopez

Chrissy Teigen and John Legend

Britney Spears

50 Cent

Taylor Swift

Kendall Jenner

Hailee Steinfeld

Tracee Ellis Ross

Kylie Jenner

Ludacris

Nick Jonas and Olivia Culpo

Wiz Khalifa

Iggy Azalea

Meghan Trainor

Calvin Harris

Charli XCX

One Direction

Ed Sheeran

Idina Menzel

Hozier

Jonathan Silver Scott and Jamillette Gaxiola

Giuliana Rancic

Jourdan Dunn

Taraji P. Henson

Danica McKellar

Fall Out Boy

Jennette McCurdy

Imagine Dragons

David Lee Roth

Zendaya Coleman

Jesse McCartney

Tori Kelly

Laverne Cox

Bailee Madison

Molly Ringwald and Panio Gianopoulos

Little Big Town

Casper Smart

Fifth Harmony

Rita Ora

Mariah Carey

Martha Hunt

Chris Brown and His Daughter, Royalty