She's a machine! Jennifer Lopez stole the show at Fashion Rocks 2014 on Tuesday, Sept. 9, at the Barclays Center in NYC. The multi-hyphenate delivered an energetic performance of her new single, "Booty," pinpointing (what else?) her most famous bodily asset.

"Tonight, we're gonna give it to you," Lopez, 45, said as she appeared onstage in a skimpy, sequined leotard-minidress while unabashedly patting her butt. The mother of two then sang, danced, and twerked her way through the song with precision as the audience roared in response. See more sexy pics from her performance.

Lopez's new single also features summer 2014 pop sensation Iggy Azalea. A teaser from the music video released last week features the two ladies showing off their famous backsides and even jiggling their butts for the camera.

Despite popular belief, Lopez told Meredith Vieira on Monday, Sept. 8, that she's not perpetually camera-ready. "This morning it took a minute to put all of this together," Lopez told the show host. "Nobody's perfect all the time and certainly not me. I wake up and I think to myself, ‘Oh my God. Put it together Lopez. Let's go!'"

Along with Lopez, stars like Nicki Minaj, Miranda Lambert, and Usher performed at Fashion Rocks 2014.

Watch her bootylicious performance above!