After Heidi sang live at the Miss Universe competition, look back at more on-stage missteps
The singer suffered an embarrassing slip-up during a concert on her "Sticky & Sweet" tour in 2008. She fell on stage -- and in front of thousands -- during a rainy concert in Rio de Janeiro, Brazil. After sliding and toppling onto her back, she recovered by kicking her legs up into the air and jumping back to her feet.
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