Mariah Carey took a break from her new Las Vegas residency at The Colosseum to take the stage at the 2015 Billboard Music Awards on Sunday.

The 45-year-old looked absolutely gorgeous in a glittering gown and sang her 1990 hit, “Vision of Love,” before switching over to her new heartbreak ballad, “Infinity,” which the singer dropped in late April.

On Wednesday, Carey was forced to cancel her Vegas show, “Mariah #1 to Infinity,” due to illness. She explained that she was battling bronchitis in an Instagram post to her fans:

Hey guys.. I’ve been fighting bronchitis for the past few days.. almost better but on mandatory vocal rest per doctor’s orders. I’m so sorry to cancel tonight’s show but I promise to make it up to you!!! Love you always, MC

A photo posted by Mariah Carey (@mariahcarey) on May 13, 2015 at 9:32pm PDT

The following evening, the “Vision of Love” singer reassured fans she was on the mend with a photo of herself rehearsing for the Billboard Music Awards:

At rehearsals for the @OfficialBBMAs #notalking #nosinging #whispering @bigjimwright

A video posted by Mariah Carey (@mariahcarey) on May 14, 2015 at 9:35pm PDT

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