Jennifer Lopez and Marc Anthony's children thought it was "awesome" seeing them duet.
Jennifer Lopez
The 47-year-old singer joined her ex-husband during his concert at the Radio City Music Hall in New York City last week to sing their Spanish hit 'No Me Ames' - which was released in 1999 - and the former couple's twins, eight-year-old Max and Emme, were in the audience and were delighted to see them on stage together.
Jennifer said: "I don't think they remember the last time; they were little... It was awesome. They just sat there and they were hearing the crowd... It was so moving... It was great."
And the former 'American Idol' judge - who divorced Marc in 2014 - was pleased to be able to join her former spouse for the show.
She told 'Extra': "We haven't been onstage together for about five years. It was good. You know, he came to my show in Vegas, to see it; we've been talking about doing something.
"He said, 'I'm doing Radio City, will you do one of the nights with me?' I was like, 'Yeah, I'll be in New York, I can do it,' so it just worked out really well."
The two stars had such a good time, they may even be heading back into the recording studio together.
Jennifer said: "We're talking about doing some stuff together... We don't have anything to announce at this moment, but soon."
Meanwhile, it was recently revealed the 'On the Floor' hitmaker will portray notorious drug lord Griselda Blanco in an HBO movie and Jennifer - who recently split from boyfriend Casper Smart - admitted the role is "intense" and "scary".
She said: "When we announced the role, I actually had anxiety for a couple of nights... It's intense. It's scary to go into those places sometimes. I know what it is to do that as an actor, what it takes."
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