Christina Aguilera, Pitbull to Perform at Billboard Music Awards

New performers for the 2013 Billboard Music Awards were announced Thursday, adding six more artists to the previously released lineup. Grammy Award-winning Christina Aguilera and rapper Pitbull, who most recently collaborated on the song "Feel This Moment," are slated to perform, as well as Selena Gomez and "Thrift Shop" artists Macklemore & Ryan Lewis. Rounding out the performers are two country acts, Kacey Musgraves and The Band Perry.

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Pitbull is a finalist in the Top Rap Artist category, while Macklemore & Ryan Lewis are finalists in four categories, including Top Rap Album and Top Rap Song for The Heist and "Thrift Shop," respectively.

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This new list of talent will join previously announced performers including Taylor Swift, Bruno Mars, Miguel and Justin Bieber. Prince will also perform, as well as receive the Billboard Icon Award for his accomplishments in the music industry.

More musical acts and presenters will be announced in the coming weeks.

The 2013 Billboard Music Awards, hosted by Tracy Morgan, will air live from Las Vegas on Sunday, May 19 at 8:00 p.m. ET on ABC.