Singer flashes her nips on stage

Beyoncé Knowles certainly knows how to get an audience fired up – by accidentally giving them a sneak preview of her boobs.

Excited fans in Toronto were treated to an eyeful when the singer’s dress flew up during a vigorous dance routine.

Performing chart hit De Ja Vu, Beyoncé, 26, grinned cheekily as she struggled to shield her nips from prying eyes.

But the bootlicious star didn’t seem to mind too much – and fans were more than happy with her curves.

Alison Adey

See Beyoncé Knowles flash her boobs on stage in this video.