Beyonce Knowles shocked fans by crowd-surfing while performing at the O2 Arena in London.

The 28-year-old singer dove off the stage during the finale of her free concert while she was in the middle of singing 'Halo.'

Mz. B, who was sporting a hot-pant bodysuit, kept singing away as she was passed from fan to fan.

Her sister Solange later twittered:

"She's just Bad-a**! How many pop stars do you know crowd surfin' in heels and still hitting perfect notes?"