The singer, 47, looked fit and happy in a new Instagram post she shared, giving her followers an update on her health.
"Feeling better and back at work! Looking forward to seeing you today at the World AIDS Day 2017 concert and then starting the Christmas tour festivities!" she wrote.
The singer had cancelled a number of concert dates due to some health troubles.
The star took to social media to explain to her fans that she would not be able to perform as planned.
Carey's health troubles began in mid-November when she initially cancelled gigs due to a respiratory infection.