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.
2017 iHeartRadio Much Music Video Awards The 2017 iHeartRadio Much Music Video Awards (or simply the iHeartRadio MMVAs) were held on June 18, 2017 outside 299 Queen Street West in Toronto, Ontario.