Lopez's children with ex-husband Marc Anthony, Maximilian David and Emme Maribel, turned 5 on February 22, reported E! News.
"Happy Birthday Coconuts!!! 5 years of joy and true love!!! #schoolcupcakes #momduties #bestfeelingever," she tweeted along with a picture of the cupcakes.
The 43-year-old singer and her dancer beau Casper Smart also took Max and Emme to a birthday pizza lunch at Planet Dailies at the Grove mall in LA.
Lopez wore a red sweatshirt and held Max's hand, while Casper carried Emme. They also made a stop at Dylan's Candy Bar for dessert.
