Christina Aguilera, A Great Big World and Ariana Grande Added to AMAs Line-Up

Aguilera and AGBW are going to perform their new collaboration, 'Say Something', while Grande will sing a two-song medley.

Christina Aguilera and A Great Big World have been announced as performers at the upcoming American Music Awards. The judge of "The Voice" is expected to perform her collaboration with the New York duo, "Say Something".

Ariana Grande has also been confirmed to make an appearance at the annual event which will be broadcast on ABC from Los Angeles' Nokia Theatre on November 24 at 8 P.M.. The Nickelodeon star will perform a two-song medley.

The stars are joining previously announced performers, which include Miley Cyrus, Lady GaGa, One Direction, Florida Georgia Line, Macklemore & Ryan Lewis, Jennifer Lopez and Justin Timberlake. Katy Perry is set to open the show with her "universal love song," "Unconditionally". Pitbull, who will serve as a host, will also join Ke$ha to perform their "Timber".

Macklemore & Ryan Lewis dominates the nominations for this year's American Music Awards. The rap duo is set to battle against other musicians in six categories, including Artist of the Year, New Artist of the Year, Favorite Band/Duo/Group and Favorite Rap/Hip-Hop Artist. They are followed by Timberlake and country cutie Taylor Swift, who receive five nods each.

The upcoming event is produced by Dick Clark Productions. Allen Shapiro and Michael Mahan serve as executive producers, while Larry Klein is attached as producer.