Ariana Grande hit up Las Vegas yesterday, where she performed at the T-Mobile Arena. The singer completely surprised audiences when she debuted her song reportedly titled, "Leave Me Lonely," to an unsuspecting stadium of fans. The ballad gets a vocal assist from Macy Gray, who adds to the track's emotional gravity and Ariana's own gravity-defying vocals. The track joins Ariana's previous album releases including the title track and "Be Alright," which she performed on Saturday Night Live.

That wasn't the only surprise Ariana gave her fans last night. She also brought out Nicki Minaj to perform their Pinkprint collaboration, “Get On Your Knees,” for the very first time live together. Earlier this week, Ariana previewed another collaboration she has with Nicki on Snapchat featuring both artists shouting out their name. This still-untitled cut is for her own album, Dangerous Woman, due out May 20. Watch the clip of Ariana performing her track above and her collaborations with Nicki below.

Snippet of Ariana's song with Nicki Minaj on #DangerousWoman!

— Ariana Grande Today (@ArianaTodayNet) April 7, 2016