The concert will take place April 7 in honor of the new 20,000-seat venue, located near the famous Las Vegas Strip and capable of holding large scale concerts, UFC fights and award shows.
"What better way to open this amazing arena than with two amazing artists -- Nicki Minaj and Ariana Grande -- and a few thousand customers and friends?" said T-Mobile CEO John Legere in a statement.
Ticket pre-sales begin today at 10:00 a.m. PT for T-Mobile customers. General ticket sales begin the following Monday, March 28.
Ariana Grande's next big concert comes shortly after the singer released her latest single "Dangerous Woman," from her forthcoming album of the same name. Grande recently uploaded a video of herself performing an a cappella version of the hit while wearing a black latex outfit.