At a gala for the LA Dodgers Foundation this week, Jennifer Lopez introduced her 14-year-old twin, Emme Muniz, with gender neutral pronouns for the very first time.

Lopez referred to Emme as her 'favourite duet partner' and joked about how difficult it is to get the teen to perform with her.

"The last time we performed together was in a big stadium like this and I ask them to sing with me all the time, and they won’t," the superstar told the huge crowd.

Watch: The trailer for JLo's new Netflix documentary, Halftime. Post continues below.

"So this is a very special occasion. They are very, very busy. Booked. And pricey. They cost me when they come out. But they’re worth every single penny because they’re my favourite duet partner of all time. So if you will indulge me."

Lopez shared some photos of the duet to Twitter, showing Emme in a bright pink matching short set.

They performed a cover of Christina Perri's 'A Thousand Years' as well as a section of 'Let's Get Loud' and Bruce Springsteen's 'Born in the USA'.

The pair performed together previously at the Super Bowl in 2020.

Last night … @Dodgers #LADFGala 📸 @notchrisvilla pic.twitter.com/r9RpLZaFMD

— jlo (@JLo)

While twin brother Maximiian Muniz or Max has not duetted with his mum on stage yet, Lopez shared a 'proud mama' moment in early 2020, when Max played a munchkin in his school production ofThe Wizard of Oz.

When the twins turned 14 on February 2, 2022, Lopez also shared a home video of them at various ages and stages, dedicated to the two 'lights of her life'.

"My babies, my sunshine, my loves. Happiest of birthdays to my two coconuts #MaxAndLulu," she wrote on Instagram.

"You have taught me the true meaning of life and have changed me forever in the most amazing way... I am so grateful to you both! Max and Lulu, I will love you forever and ever and ever."

Born in 2008, Lopez co-parents Max and Emme with her former husband and fellow recording artist Marc Anthony, who she married in 2004 and divorced 10 years later.

In a 2008 interview for Elle Magazine when the twins were just six months old, Lopez explained how she didn't panic when she didn't fall pregnant right away.

"We knew nothing was wrong with either one of us – I had been checked, and he had kids already," she toldElle.

"I knew [that] something's not ready here, in my head or in my life, and when it is, I know it's going to happen."

She had a suspicion she was pregnant after feeling a strange physical sensation that hinted at early symptoms.

"I was sitting down doing hair and makeup and I felt a flutter. The weirdest little... flourish. My makeup artist said, 'What's the matter?' I didn't say anything, but in my head, I was like, 'I have life inside me!'"

While pregnant, Lopez toldElle Magazineshe really just wanted to enjoy every minute and enjoy being 'a little bit selfish'.

"I don't know if I’m going to have kids again, so I want it to be a beautiful experience. I don’t want to have any drama. I want to just be smiling every day."

Over the years, she has shown what a close connection she has with her kids, even letting them interview her for her YouTube channel in 2019.

"I had you two at 37 and it was hard," she explained in the video.

"I wanted to jump out of the window so many different times because when one of you cried, the other one cried, and I was like, 'Argh, what do I do? You can't cry when he cries!'"

Apart from the challenges of parenting, she tells them about the true love she feels for them both.

"You cannot imagine what it's like to be a mum until you are a mum," she told Max, after he asked her about motherhood.

"You realise that the love you have for your kids is so deep that all the normal rules for other people don't apply."

In 2020, and after a few months into pandemic life, Lopez gave an interview toWSJMagazine, sharing how she enjoyed being home and having dinner with the kids every night.

"The kids kind of expressed to me the parts that they were fine with about our lives and the parts they weren't fine with," she said.

"You thought you were doing okay, but you're rushing around and you're working and they're going to school and we're all on our devices."

She said the time