(FILES) In this file photo taken on January 28, 2018 Bruno Mars receives a second Grammy for Record of the Year during the 60th Annual Grammy Awards show in New York.  The Grammys will expand the number of nominees in main categories for music's most prestigious awards as organizers try to counter a backlash over how few women and minorities are winning. In one of the biggest changes at the Grammys in years, the Recording Academy -- which administers the prizes -- said June 26, 2018 in a letter to members that next year's awards will boost the field of hopefuls from five to eight for the top four categories. / AFP / Timothy A. CLARY
Bruno Mars receives a second Grammy for Record of the Year during the 60th Annual Grammy Awards show in New York. AFP

Grammys expand nominee field after criticism on diversity