Should it be a career wrap for Mariah Carey?

Singer Mariah Carey's fans have criticised her vocal performance following a concert in Japan. Some fans feel it's time for her to retire, while others felt it proved why she refrains from performing live.

The "Hero" hitmaker was mocked by her fans on social networking site Twitter after her performance during Elusive Chanteuse World Tour in Tokyo Saturday, reports dailymail.co.uk.

One Twitter user, Elle, posted: "It's a wrap for Mariah Carey's singing career. You're a legend. Time to retire. She can't sing anymore. At all. What happened?"

Another user, tweeted after seeing the video of the event: "Y'all. Mariah Carey really can't sing anymore. That was hard to listen to. I see why Mariah Carey never sings live anymore.

"That's why Mariah Carey should've bowed out right when her voice was giving out. Save herself the embarrassment. I knew it was something wrong with MC though. No artist lip syncs at EVERY show."

The 44-year-old singer also appeared to struggle with her microphone when singing "We belong together", with the butterfly decal detaching from the mic.

She attempted to continue uninterrupted with the song, though halted and said, "Wait a minute. I can't go on."

However, some fans thoroughly enjoyed Carey's gig, with Abby tweeting: "I just had the absolute best time at @MariahCarey#TheElusiveChanteuseShow #Tokyo Def a night to remember!!!!"

A representative for the star says that they've only received good reviews from people who attended the opening show.