The "I Luh Ya Papi" singer was clad in a white hot ensemble that included a cut-out bodysuit with sheer paneling, cropped vest, fishnets and lace-up heeled boots, which she complemented with matching white nails and chunky cornrow braids.
Attendees got a huge surprise during the dynamic set at the MGM Grand when J.Lo revealed the name of her upcoming residency at Planet Hollywood, which she's titled All I Have.
ET special correspondent Elvis Duran spoke with the 46-year-old singer-actress after her steamy performance, and she promised fans that they would get an even more up close when she hunkers down and truly gives Sin City her all.
"I'm so excited about it," she told ET of her new show, which opens Jan. 22. "I feel like I'm really gonna get to create the show of my dreams. I just can't wait."
The show name is apropos, as "All I Have" was not only the title of one of her biggest hits, but also what the singer says she intends to give. "I feel like it really describes me," she adds. "It's what I do and everything that I do. I give it all I have."
One of the aspects of the residency that the Bronx native is most looking forward to is sharing a close space with her fans rather than performing in large arenas and venues. "You get to have an intimate experience with the audience, and I feel like I'll be able to give them all I have when they come to this show," she says.
Even though her show doesn't officially kick off for another four months, Jennifer hosted a launch party to celebrate her upcoming residency at the Chateau Nightclub at Paris Las Vegas after her iHeartRadio performance on Saturday. She even walked into the venue to "All I Have" playing in the club before settling in and snuggling up with her boyfriend, Casper Smart, in a VIP booth.
But before she settles in Nevada, there's one last task at hand to complete: the final season of American Idol. J.Lo admits that the impending end to the reality show juggernaut is "very melancholy."
"There's something great about being part of one of the greatest shows ever and this whole journey," the Idol judge tells ET. "It's always an emotional journey, but this year, all the more."
And if all goes the way Jennifer says, we may be seeing the most talented group of contestants during season 15. "I think people know it's their last chance," she says. "We have all these great people coming out and going, 'Listen, I may never get this opportunity ever again,' and they might not. Not on this level;, not in this way. So, we have a great season ahead."