In the best of moods since ending her fizzled out marriage, Jennifer Lopez was busy celebrating her birthday in Miami, Florida over the weekend.

Turning 42-year-old on Sunday (July 24), the newly single "American Idol" judge joined family and friends including manager Benny Medina aboard the private yacht "Never Say Never".

Wearing a Emilio Pucci bikini top and matching head scarf, J Lo was first seen lounging on the forward deck of the yacht before spontaneously getting up to dance.

The previous night, Miss Lopez headed out to Scarpetta restaurant at the Fontainebleau hotel with a party of 16 including her mom and sister.

A source told People magazine of the scene, “Jennifer looked radiant in a purple and silver evening dress. And when they brought out her birthday cake after the meal, she began to sing. She was very happy. The whole group had a blast, staying for hours. They closed down the restaurant.”

Enjoy the pictures of Jennifer Lopez celebrating her birthday aboard a yacht in Miami (July 24).