Jennifer Lopez is pushing herself to exhaustion working 13 hour days before Vegas concerts to prove she is still on top after painful divorce

Jennifer Lopez is launching the next phase of her Las Vegas residency, The JLo Show, on Friday at The Colosseum in Caesars Palace.

And Daily Mail has learned that the 56-year-old performer has been working nonstop to prepare for the new shows in Sin City.

'Jennifer is rehearsing night and day to make sure the show is spectacular, better than ever,' a source told Daily Mail.

'She is working 13 hour days at a studio in North Hollywood with her back-up dancers to make certain she looks like she is on top of her game. She always says she want to be "better than yesterday," it's her thing.'

Lopez flew from Los Angeles to Las Vegas on Thursday evening via private plane. 

Another reason she is putting so much energy into the shows is that she wants her act to be considered one of the top draws in Las Vegas.

'Everyone is going to the Sphere these days, that is the town's big deal, so she wants to prove that a more old-fashioned concert at the Colosseum is still the place to be,' added the insider.

Daily Mail has reached out to Lopez's representative for comment.

And the ex-wife of Ben Affleck wants to remind fans that even though she is well into her fifties that she is still in her prime.

'Jennifer loves to work, she never complains, it's her jam,' said the source. 'Some people like to vacation on the beach in Hawaii, and some like to work nonstop. Jennifer is the latter. She feels proud to be doing so well at her age and as a Latin woman.'

The shows will also feature some guests along the way. 'There will be a lot of excitement and surprise stars,' said the source. 

Ja Rule performed at one of her December shows in Vegas. 

On Wednesday evening Lopez shared a video from her Los Angeles studio where she was rehearsing into the late hours, proving the source's point.

She wore a blue T-shirt that said DREAM with black leggings and her hair up.

'SAVE ME TONIGHT with my crew ✨ @davidguetta,' wrote the siren in her caption. Save Me Tonight is the name of her new up-tempo single which will come out this week.

'We're very excited,' she told Derek Hough from Extra earlier this week. 'We're doing the show again in Vegas and we're there every weekend in March which is exciting and adding some new songs to the show.'

She shared, 'It's been a while since I put out a new song, but David Guetta had this song [Save Me Tonight] and I just loved it. 

'It just felt very much of the moment for me.'

Lopez called the concert 'the quintessential JLo show.' 

She explained, 'You see who I am, I think, as not just an entertainer, a performer, but as an artist and as a human.'

She teased, 'I still do all my hits and all the songs that people know me for, but it's really done in a very fresh and exciting way.'

And she explained why she worked so hard. 

'I'm in my happy era and I have that in the show… I've never looked at it as a job. It's just what I love to do.

'And I just feel fortunate that I have these amazing fans who've supported me for so many years and there's so much love that I feel that I always want to be giving the love back to them,' said the Bronx native.

'It's just been an incredible blessing in my life. I don't know what I would do without it.'

The JLo Show is at the Colosseum at Caesars Palace from March 6 to 28.

The single Save Me Tonight is out on Friday. It's the same day that Jennifer restarts her Vegas residency, The JLO Show, and she will be live streaming the performance of Save Me Tonight, live from Las Vegas at approximately 8.30pm PT across social media platforms.