Madonna and A-Rod Make Public Debut in Miami

As Madonna completed her second song before a sell-out crowd in Miami's Dolphin Stadium Wednesday night, New York Yankees slugger Alex Rodriguez handed her a bottle of water.

"It was easy for him to hand it off because he was sitting in the front row," a witness tells E! News. "He was all excited watching her perform."

And, just like that, Madonna acknowledged in public, less than a week after her quickie divorce from Guy Ritchie, that A-Rod is indeed the superfan (and waterboy) he's reportedly been for most of this year in private.

The two arrived in town together on Monday and spent most of Wednesday hanging around town with pal Ingrid Casares, a prominent Miami party promoter, who introduced the pair.