Marc Anthony sings with wife at inaugural ball

For his last number, Anthony thrilled the crowd Tuesday night by inviting "my wife" to sing with him.

Lopez appeared on stage in a white draped gown with flashes of gold and one shoulder bare. They kissed before launching into an upbeat love ballad in Spanish, occasionally gazing into each other's eyes and caressing one another.

Earlier in the night Anthony talked about Lopez before singing a song for her.

"I wrote this next song about Jennifer. I must have been psychic," Anthony said. He said he wrote the song "You Sang to Me" about 10 years ago.

"She didn't get the point," Anthony said, "but eventually it worked."

At the end of the couple's duet, they kissed again.

"Man, she's cute," Anthony said after Lopez walked offstage. He then bid the crowd goodnight.