Jennifer Lopez Talks Vegas Beginnings, 'Idol' Endings, and Boyfriend Maybes

ET caught up with the stunning superstar -- and Casper Smart -- on the red carpet at the Billboard Music Awards.

Jennifer Lopez is as busy as she is stunning.

Showing off her assets in a beautiful, but barely-there, Charbel Zoe gown at the Billboard Music Awards, Lopez opened up to Entertainment Tonight about her buzzed-about Las Vegas residency and the impending end of American Idol.

"I'm super excited about it," she told ET's Cameron Mathison, gushing about her Planet Hollywood residency. "I don't know if I'm gonna move here. I'm doing 40 shows next year, we'll see what happens the following year. [It's] supposed to be two-to-three years."

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J.Lo's stint at the AXIS theater follows Britney Spears' highly successful Piece of Me show, and kicks off on Jan. 20, 2016.

"It's gonna be an awesome show. It's gonna be a lot of fun," the 45-year-old said.

But first, she's got to wrap up the final season of American Idol. "It is a big deal! It's such an institution, it's America's favorite show," she said. "I like to think it's not going to end. I think something's gonna happen... I'm gonna ignore it [and] just have the best season ever next season and see what happens."

Jenny from the Block may have been forthcoming about her career, but kept tight-lipped when asked about her rumored, re-kindled romance with Beau Casper Smart.

"I don't feel like I need to talk about it," she said, teasing us with, "I don't know, I don't know."

NEWS: Jennifer Lopez Lands Las Vegas Residency

Coincidentally, Smart also walked the red carpet on Sunday. Asked about J.Lo's recent appearance on The Ellen DeGeneres Show, where she teased that she "may or may not" have a boyfriend, Smart didn't offer much clarity. In fact, he left us feeling even more confused than before. See for yourself in the video below.

"There's all kinds of rumors. We got married, we had babies, we got divorced, we got all kinds of things," he said. "It's the media, it's rumors, it's tabloids and when something happens for real, it happens for real."

And what about J.Lo's recent revelation that she wants more kids? "Kids are great," Smart teased. "Kids are amazing."

Good talk, guys.