The arena that hosted the 2017 "Billboard" Music Awards opened  on what date?
T-Mobile Arena T-Mobile Arena is a multi-use indoor arena on the Las Vegas Strip in Paradise, Nevada. Opened on April 6, 2016, the arena is a joint venture between MGM Resorts International and the Anschutz Entertainment Group.
Microsoft Theater The Microsoft Theater (formerly Nokia Theatre L.A. Live) is a music and theatre venue in downtown Los Angeles, California at L.A. Live. The theatre auditorium seats 7,100 and holds one of the largest indoor stages in the United States.