Days after reportedly splitting up with longtime beau Casper Smart, Jennifer Lopez isn’t sitting around moping — in fact, she took to the stage of New York’s Radio City Music Hall to join ex-husband Marc Anthony onstage for a surprise appearance that made fans go wild.

As People reports, JLo surprised her ex by appearing onstage with him, with the two performing a duet of their Latin pop hit “No Me Ame.”

RELATED: Jennifer Lopez Reportedly Splits From Her Longtime Boyfriend Casper Smart

“The queen!” Anthony gushed to the crowd as she exited the stage, adding, “Wow!”

Following the performance, JLo posted a pic on Instagram of the pair singing together, writing: “Always fun sharing the stage w this one…” and adding the hashtag #familia.

Anthony later shared a photo of himself and Lopez backstage, posing with their children, Emma and Max, along with Anthony’s wife Shannon De Lima.

Check out fan-shot footage of their duet: