From the NY Daily News:

Cheerleader Mariana de Leon made a major splash at the Pan Am Games in Mexico when she fell into a swimming pool while performing a cheerleading routine.  The 21-year-old was among 12 cheerleaders doing a routine to “Lambada” when she lost her footing – and landed in the water.

Professional to the end, her fellow cheerleaders barely missed a beat and kept performing the routine.