LAS VEGAS: The Billboard Music Awards will feature a mix of emotional and explosive performances. Madonna will pay tribute to Prince, who died last month; Kesha will now sing live Sunday after her performance was initially canceled by her former mentor; and Celine Dion who recently lost her husband and brother will perform Queen's 'The Show Must Go On.' The show, airing live on ABC from the T-Mobile Arena in Las Vegas, will open with a 7-minute medley from Britney Spears, and other high energy performances from Justin Bieber, Pink and Rihanna will take place during the three-hour event. Other performers include Blake Shelton, Gwen Stefani, Ariana Grande and the Go-Go's. The Weeknd is the top nominee. He is nominated for top artist with Adele, Taylor Swift, Bieber and Drake.