Jennifer Lopez and Marc Anthony had the audience going wild when they walked out on stage together last night.

"JLo and Marc each sang two songs -separately -but at the end they came out together in a hail of confetti and embraced," an eyewitness tells RadarOnline.com.  "The crowd went nuts!"

PHOTOS: Jennifer Lopez and Marc Anthony Hug On Stage

The event was the finale for ¡Q’VIVA! THE CHOSEN LIVE presented by Blackberry, a celebration of Latin culture directed by Jamie King, who helmed Madonna’s Superbowl halftime show.

Jennifer Lopez and Marc Anthony looked anything like a couple in the midst of a divorce as they promoted their new show, Q'Viva! The Chosen.

Marc was spotted complimenting his estranged wife on the rings she was wearing, and the pair even briefly held hands at the Saturday event.

PHOTOS:  J.Lo And Marc Anthony Hold Hands While Promoting New Show Q'Viva!

The former couple did a suburb job in hiding what is really going on with them. As RadarOnline.com exclusively reported, Marc wants J.Lo to see a psychiatrist to figure out why she jumps from one love affair to another.

She began dating one of her back-up dancers, Casper Smart, within weeks of announcing she and Anthony's marriage was over. He's now dating model Shannon de Lima.

But their split was the elephant in the room that organizers made sure wasn't addressed today.

Most of the session with TV critics was taken up by pre-packaged clips of the music reality show which will air on Univision. There was almost no opportunity for reporters to ask questions.

When one finally did inquire how it was for the two to be working together again, Lopez responded, "Same as it was any other time we worked together. We have a great time working together."