Britney Spears will be honored at this year’s Billboard Music Awards with the prestigious Millennium Award. She’ll also perform a medley of her chart-toppers during the awards show.  It’ll be a great night as Spears joins previously announced performers Justin Bieber, DNCE, The Go-Go’s, Shawn Mendes, P!nk, Nick Jonas, Tove Lo and Demi Lovato. The Billboard Music Awards will air live from Las Vegas on Sunday, May 22 at 8:00. p.m. ET on ABC. We’re giving away trips all week. Click HERE for more