Kika Press; PacificCoastNews.com

It was an eye-popping show to be sure.

Jennifer Lopez was performing some tricky dance moves in a sexy sequined catsuit during a sold-out concert in Bologna, Italy last Thursday when a wrong step caused the top of her skintight dress to shift near the chest, briefly exposing her nipple to thousands of adoring fans.

Emma Watson suffers wardrobe malfunction

The "On the Floor" hitmaker didn't duck for cover. Instead, after a quick adjustment with the aid of her dancers, Lopez went right on performing like the pro she is.

This is J.Lo's second wardrobe malfunction in a week. According to Hollywood Life, Lopez flashed her Spanx on stage a few days ago.

Here are some other favorite celeb wardrobe malfunctions