Nicole Winhoffer, Madonna's go-to trainer, must have found the fountain of youth, because, well, have you seen Madonna recently? She is snatched.

Actually, Nicole and M spend hours a day, multiple days a week, in front of a huge flat screen TV watching DVDs—and yesterday morning 500 New Yorkers auditioned to join them.

In anticipation of the world premier of Madonna MDNA Tour (June 22 on EPIX)—the 54 year-old Madonna and Winhoffer put out a challenge to dancers, gym rats, movers and shakers to try to hang with them during their most intense of workouts. Madonna was not in yesterday's audition but, the last 30 standing last night are currently sweating with THE oldie in a secret dance studio in Manhattan.