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16 January 2013, 12:58 | Updated: 16 January 2013, 13:59
The 'Who You Are' singer delighted the audience member when she took the fan's phone during her show.
Jessie J filmed herself on stage with a fan's camera phone during a secret gig in Singapore this week.
The 'Domino' star surprised the fan when she grabbed her phone while she was singing her hit 'Nobody's Perfect'.
In the video, which you can watch below, Jessie spins around while filming herself before giving the excited fan her phone back.
On YouTube, the fan described Jessie J as "awesome", while the singer said the performance was "amazing" in a post on Twitter.
Jessie put her long legs on show for her gig, which took place on the rooftop of a building in the city, and gave fans back home a glimpse of her outfit.
Watch Jessie J filming herself on the fan's camera:
Meanwhile, Jessie, who has since returned to the UK, is continuing to work on her new album - the follow-up to her 2011 debut 'Who You Are'.
Check out a photo of Jessie J ahead of her performance in Singapore below: (picture: Instragram)
The 'LaserLight' singer has vowed not to rush out a new release, after delaying her 'Nice To Meet You' UK arena tour until October to give her more time in the studio, and advised her fans that "art cannot be rushed".