Jennifer Lopez shows off amazing abs on day 9 of her 10-day challenge and her ex-boyfriends are here for it

Either Jennifer Lopez has a dramatically ageing portrait locked away in her attic, or you know, she takes incredibly good care of herself.

Certainly, while we'd like to chalk it down to just winning the genetic lottery - you know, to spare us from doing any hard work - it appears that J-Lo follows some pretty intense regimens to conserve her fountain of youth. Yes, though she may be from the block, her diet and exercise routines are anything but.

Case in point: the singer has been smashing her 10-day no carb, no sugar challenge, and her abs are looking super defined after just nine days.

The Get Right singer showed off her abs - and biceps to boot - to Instagram, and checked in with her followers who joined her and her partner, Alex Rodriguez, for the rather gruelling challenge.

“Day 9 and feelin’… like I can’t wait for Day 10,” Lopez, 49, wrote. “Who’s still with us? @arod”

And her boyfriends - present and past - absolutely loved the update. Diddy, who she dated back in the early Noughties, slid into the comments section to write "OMG", while her current beau corroborated, "Lucky me".

J-Lo and Alex decided to challenge themselves to cut out sugar and carbs back on the 21st of January, and when they were halfway through they invited other people to join in.

"We’re just walking in from the gym and we’re in the middle of our 10-day challenge and it’s getting lonely," she said in a video which was posted on the 25th January. "Let’s challenge some people!"

Jennifer and her boyfriend of two years called out Leah Remini, Today co-host, Hoda Kotb, and producer, Elaine Goldsmith-Thomas.

Kotb was all for it, and even got her fellow Today co-hosts, Savannah Guthrie, Craig Melvin, Al Roker and Carson Daly to give it a try. Not all attempts were fruitful, however, with Carson dropping out of the diet and fitness challenge in less than 24 hours.

"Forgive me, J.Lo, for I have sinned," the American television host joked on Monday. But to his credit, he admitted to barely having tried. "By the time I got home, I had a text from my sister who doesn’t cook that often and she invited my family over to her family’s house. She made individual chicken pot pies. What am I supposed to do, not eat that?" he explained. "Am I supposed to show up with my own bag of broccoli and [say], ‘Oh, I can’t have any carbs?’ It’s Friday night!"

Whereas, Hoda is apparently loving the experience, saying that she had a "little bit of a different experience" than Carson. She asserted that the challenge is "amazing" and credited her improved energy levels to it. However, even Hoda didn't follow the rules to a tee, she admitted to indulging in a little alcohol and adding a little Coffee-Mate to her coffee.

Well, good on you J-Lo. While we can't all promise to abstain from carbs and sugar ourselves, we're certainly enjoying the updates.