"It was so much fun," Lopez said about her spectacular show, admitting that the experience was a bit overwhelming. "First I'm back here, and I'm on my staircase with my big Versace feather thing, and then I walk here and it was like, 'Woo! This is your life.'"
But aside from all the spectacle -- including eight super sexy costume changes, with Swarovski crystals covering the bare essentials -- it's actually a quiet moment in the show that had J.Lo in tears. Lopez sweetly dedicated Lee Ann Womack's "I Hope You Dance" to her two children with ex-husband Marc Anthony, 7-year-old twins Emme and Max.
"You know what, in rehearsal every time I sing the damn song I get choked up," Lopez admitted to ET. "Like, the dancers, they know me, the band they're like, 'She's going to cry again.' I can't help it. It makes me emotional to think about them."
Of course, J.Lo's big night wasn't all work and no play. The "Waiting For Tonight" singer's after-party at Mr Chow restaurant in Caesers Palace was a star-studded event, with plenty of her close friends making an appearance. Justin Bieber, Derek Hough, Alicia Vikander, Nicole Scherzinger, Ne-Yo, Rosie Huntington-Whiteley, Casey Affleck, Gina Rodriguez, Wilmer Valderrama, her co-stars Ryan Guzman and Ray Liotta, and her BFF, Leah Remini, were all in attendance, where they were served lobster and Dom Perignon 2006 champagne, a source inside the party tells ET.
Later in the evening, Hough started a dance circle in the middle of the main room, which stars like Vikander and Ne-Yo loved, the source adds. Hough also spent a lot of time chatting with Seacrest, his sister Julianne Hough's ex-boyfriend.
As for Lopez herself, she mostly stayed in the private room with Remini and her boyfriend, choreographer Casper Smart, who our source says was "attentive" to his superstar girlfriend.