Selena Gomez, Taylor Swift, Kesha, Dua Lipa Perform at 2019 American Music Awards

Selena Gomez performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Kesha performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Dua Lipa performs 'Don't Start Now' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Taylor Swift performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Shania Twain performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Lizzo performs "Jerome" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Toni Braxton performs "Unbreak My Heart" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Ciara performs 'Melanin' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Shania Twain performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Ciara performs 'Melanin' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Christina Aguilera performs 'Fall On Me' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Toni Braxton performs "Unbreak My Heart" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Lizzo performs "Jerome" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Camila Cabello and Shawn Mendes perform "Senorita" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Ciara performs 'Melanin' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Taylor Swift and Shania Twain are seen at the conclusion of the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Kesha and Big Freedia perform a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Ciara performs 'Melanin' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Toni Braxton performs "Unbreak My Heart" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Thomas Rhett performs "Look What God Gave Her" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Billie Eilish performs "all the good girls go to hell" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Kesha and Big Freedia perform a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Billie Joe Armstrong, of Green Day, performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Toni Braxton performs "Unbreak My Heart" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Halsey performs 'Graveyard' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Lizzo performs "Jerome" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Taylor Swift, winner of the artist of the decade award, performs a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Ciara performs 'Melanin' at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Kesha and Big Freedia perform a medley at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)

Lizzo performs "Jerome" at the American Music Awards at the Microsoft Theater in Los Angeles. (Image: AP)