The superstar showed off her powerful vocals as she climbed on top of a piano to perform her new single 'You're Mine' at the Warner Theatre in Washington, D.C. on Saturday (8 February).
While Mariah impressed with her first live performance of the track, it was her plunging strapless number that got the crowds talking.
The mum-of-two, who is married to US actor and presenter Nick Cannon, teamed her sexy outfit with a pair of black gloves, drop earrings and a sparkly necklace.
After delivering a sensual performance, Mariah got a hug from proud daughter Monroe backstage. Aww!
Before the performance, the former American Idol judge shared a backstage photo on Instagram. She said: "At rehearsals for the #BEThonors."
Mariah performed alongside Jennifer Hudson and Janelle Monae at the awards ceremony, which aims to celebrate the work of music icons.
'You're Mine' is another single to be taken from Mariah's highly-anticipated studio album The Art Of Letting Go, which is expected to be released in the Spring.
Mariah released her first track from the album, 'Beautiful', in May last year. 'You're Mine' is expected to be released this week on 14 February to tie in with Valentines Day.
Watch Mariah's music video for 'Beautiful' below: