Judge and show creator Simon Cowell was full of praise for her performance. “Seriously, J-Lo. If anyone wants to know how you do it -- that's how you do it," he said on the show. “Seriously, world-class.”

The 43-year-old singer took to the stage to perform her new single "Live It Up" while wearing a black leotard that was quite friendly to her bottom half. Twitter lit up almost immediately, calling Lopez's outfit too inappropriate for a family-oriented prime-time program.

She says it's a body suit, so get over it people:

http://www.businessinsider.com/jennifer-lopez-defendsconcert-costume-2013-5

By comparison, J Lo in yoga pants: http://imgur.com/a/GzwzO

J Lo at 2013 Billboard music awards:

Other recent J Lo looks:

Still no comparison to the icon — and I can't believe there's no animated GIF of her entrance in this one! Ah, life before YouTube… http://en.wikipedia.org/wiki/Green_Versace_dress_of_Jennifer_Lopez

It's hard to find a YouTube source of decent quality to make the gif:

Btw Jennifer Lopez recently had more to say about the dress:

http://nymag.com/thecut/2013/07/j-lo-has-more-to-say-about-that-versace-dress.html