Knowles will attend the prize giving on 22 May (11) at the Mgm Grand Garden Arena, reports Contactmusic.
The Billboard Millennium Award will recognise Beyonce''s career achievements and influence in the music industry. Previously, Billboard named Beyonce its Woman of the Year in October 2009, and Top Female Artist of the Decade in December 2009.
The show will be a star-studded affair - Rihanna, the Black Eyed Peas, Keith Urban, Lady Antebellum, Cee Lo Green, Nicki Minaj, Pitbull and Taio Cruz are among the performers at the awards.
