The 2015 Billboard Music Awards on Sunday in Las Vegas, hosted by model Chrissy Teigen and rapper Ludacris, had plenty of surprises and great performances.

Iggy Azalea, Pharrell and Sam Smith each won three awards.

Romeo Santos won Top Latin Artist. Enrique Iglesias won Top Latin Album, and along with Descemer Bueno and Gente de Zona won Top Latin Song for "Bailando."

Hozier, One Direction, Jason Aldean, John Legend and Enrique Iglesias each won two, but it was Taylor Swift who took home the most wins -- 8 to be exact, including Top Artist.

"Oh, this is such a good night!" she said after winning the top prize. "Early this morning I watched my brother Austin graduate from Notre Dame ... (and) to anyone who's graduating this year ... this is for you."

The singer also premiered her star-studded "Bad Blood" music video at the top of the show, which was nearly upstaged by her shared PDA with Calvin Harris.

When Kendall and Kylie Jenner hit the stage to introduce their brother-in-law Kanye West, the anti-Kardashian portion of the audience booed the famous sisters. The sisters carried on with their scripted introduction of West who was set to perform "Black Skinhead" and "All Day."

West received heckling as well after his set, which had been so smoky and dark you could barely see him perform, reports Billboard.

Worse yet, the 37-year-old rapper's performance was censored throughout due to explicit language. Television viewers could not hear 20 percent of the performance, according to Billboard.

Despite Louis Tomlinson's recent feud with Zayn Malik on Twitter, One Direction remembered Mailk following their win for Top Duo/Group.

"There's one more person to share this with, and that's our brother Zayn," Liam Payne said.

Here is the full list of finalist winners, according to Billboard:

TOP ARTIST

Taylor Swift

TOP COUNTRY ARTIST

Florida Georgia Line

BILLBOARD CHART ACHIEVEMENT AWARD PRESENTED BY SAMSUNG GALAXY (FAN-VOTED)

Taylor Swift

TOP TOURING ARTIST

One Direction

TOP FEMALE ARTIST

Taylor Swift

TOP RADIO SONG

John Legend, "All of Me"

TOP MALE ARTIST

Sam Smith

TOP RAP SONG

Iggy Azalea feat. Charli XCX, "Fancy"

TOP BILLBOARD 200 ALBUM

Taylor Swift, 1989

TOP DUO/GROUP

One Direction

TOP NEW ARTIST

Sam Smith

TOP BILLBOARD 200 ARTIST

Taylor Swift

TOP HOT 100 ARTIST

Taylor Swift

TOP DIGITAL SONGS ARTIST

Taylor Swift

TOP RADIO SONGS ARTIST

Sam Smith

TOP SOCIAL ARTIST

Justin Bieber

TOP STREAMING ARTIST

Iggy Azalea

TOP R&B ARTIST

Pharrell Williams

TOP RAP ARTIST

Iggy Azalea

TOP ROCK ARTIST

Hozier

TOP LATIN ARTIST

Romeo Santos

TOP DANCE/ELECTRONIC ARTIST

Calvin Harris

TOP CHRISTIAN ARTIST

Hillsong United

TOP SOUNDTRACK

"Frozen"

TOP R&B ALBUM

Pharrell Williams, "G I R L"

TOP RAP ALBUM

J. Cole, "2014 Forest Hills Drive"

TOP COUNTRY ALBUM

Jason Aldean, "Old Boots, New Dirt"

TOP ROCK ALBUM

Coldplay, "Ghost Stories"

TOP LATIN ALBUM

Enrique Iglesias, "Sex and Love"

TOP DANCE/ELECTRONIC ALBUM

Lindsey Stirling, Shatter Me

TOP CHRISTIAN ALBUM

Lecrae, "Anomaly"

TOP HOT 100 SONG

Meghan Trainor - "All About That Bass"

TOP DIGITAL SONG

Meghan Trainor, "All About That Bass"

TOP STREAMING SONG (AUDIO)

John Legend, "All of Me"

TOP STREAMING SONG (VIDEO)

Taylor Swift, "Shake It Off"

TOP R&B SONG

Pharrell Williams, "Happy"

TOP COUNTRY SONG

Jason Aldean, "Burnin' It Down"

TOP ROCK SONG

Hozier, "Take Me to Church"

TOP LATIN SONG

Enrique Iglesias feat. Descemer Bueno & Gente de Zona, "Bailando"

TOP DANCE/ELECTRONIC SONG

DJ Snake & Lil Jon, "Turn Down For What"

TOP CHRISTIAN SONG

Carrie Underwood, "Something in the Water"