The roster for this year's Billboard Music Awards has expanded. Christina Aguilera, Pitbull, Selena Gomez and Macklemore and Ryan Lewis have just been added to the lineup of performers for the show, which will air live from Las Vegas May 19 on ABC.
As previously reported, Justin Bieber , Taylor Swift, Bruno Mars and Prince are already confirmed as performers for the show, where Taylor Swift , fun. and Maroon 5 are the leading nominees. Tracy Morgan will host the show.
Last year's big winner was Adele , who triumphed in twelve different categories.
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