Which multi-use indoor arena on the Las Vegas Strip opened on April 6, 2016, and was the site of the "Billboard" Music Awards?
2017 Billboard Music Awards: The 2017 "Billboard" Music Awards was held at the T-Mobile Arena in Las Vegas on May 21, 2017. T-Mobile Arena:  Opened on April 6, 2016, the arena is a joint venture between MGM Resorts International and the Anschutz Entertainment Group.
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