British pop star Pixie Lott was left red-faced at the London premiere of The Dark Knight Rises earlier this week (begs16Jul12) after she suffered a hairy moment in front of fans.

The star was one of the celebrity guests invited to watch the latest installment of the Batman franchise, and strutted her stuff on the red carpet in a revealing blue dress.

But the Boys & Girls hitmaker showed off more than she intended to when she posed for fans and revealed her unshaven armpits.

After the embarrassing snaps appeared online, Lott took to her Twitter.com page to laugh off the female grooming faux-pas.

She writes, "Ooooopsies a little bit (hairy) from in between waxes hahaha."