Last week, more than 21 million viewers tuned in to see Baltimore-born singer Mario and his partner, Karina Smirnoff, dance the quickstep on ABC's Dancing with the Stars. The Monday telecast was second only to Fox's American Idol in the Nielsen ratings.

Tonight, it's the tango for Mario, and he says he wishes he had more rehearsal time last week to work on the dance. Most of his week was spent in Florida performing at concerts and BET's Spring Bling rather than working out in a Los Angeles dance studio.

On TV Dancing with the Stars airs at 8 tonight on ABC (WMAR, Channel 2).