The arena that hosted the 2017 "Billboard" Music Awards opened  on what date?
2017 Billboard Music Awards The 2017 "Billboard" Music Awards was held at the T-Mobile Arena in Las Vegas on May 21, 2017. The list of nominees was announced on April 10, 2017. Non-televised awards were announced on "Billboard" website the same day as the main ceremony.
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.