Ariana Grande and Christina Aguilera Join American Music Award Line Up

The line up for Sunday's anticipated American Music Awards just got bigger with two big voices — Ariana Grande and Christina Aguilera.

According to Dick Clark Productions, both women will be performing when the anticipated celebration of music takes place live from Los Angeles Sunday night.

"A Great Big World and Christina Aguilera will perform "Say Something," and Ariana Grande will also perform at the "2013 American Music Awards," organizers report. "As previously announced, Luke Bryan, Miley Cyrus, Florida Georgia Line, Lady Gaga, Ke$ha, Imagine Dragons, Kendrick Lamar, Jennifer Lopez, Macklemore & Ryan Lewis, One Direction, Katy Perry, Rihanna, Justin Timberlake, TLC and this year's host, Pitbull, will all perform on this year's AMAs."

The 2013 American Music Awards are slated to air Sunday, Nov. 24 at 8 p.m. ET/PT on ABC.