Jennifer Lopez on Upcoming Las Vegas Residency: 'I've Been Preparing for This My Whole Life'

J.Lo talks 'Idol's' final season and how she and boyfriend Casper Smart make their relationship work.

As the summer of heartbreak rages on, Jennifer Lopez and Casper Smart are still going strong.

ET caught up with the 46-year-old stunner at the American Idol auditions in Philadelphia on Sunday, where she opened up about making their relationship work.

WATCH: 17 Times J.Lo Totally Defied Her Age

When asked how the pair is able to find time for each other, Lopez said: "It's a lot of work, this business, but we do our best."

American Idol
isn't the only job keeping Lopez busy these days -- she's also gearing up to kick off her Las Vegas residency on January 20, 2016.

"I think I've been preparing for this my whole life," she revealed. "I'm excited about going to Vegas [and] doing the kind of quintessential show that I've always had in my mind."

NEWS: J.Lo Lands Las Vegas Residency

Lopez teased a show that will feature all her pop hits while embracing "my Latin side, my fun side, and my hip-hop side."

"It's gonna have everything that I've been known to do over the years, and it's gonna be a beautiful, glamorous kind of Vegas show," she said. "Something that I think people, whether you're a fan of my music or not, would come and see and really enjoy. That's my goal."

But first, the pressure is on to make American Idol's farewell season the best one yet.

"I think [it's] just a really exciting season," she said. "We'd rather have an extraordinary tight group of kids than a bunch of kind of good [ones]. -- OK, we're not going for good this year -- we're going for over the top!"

American Idol
season 15 will air on FOX this fall.