For Gina Brooke, the magic of a Madonna concert isn't when the pop star is strutting on stage with a full set of backup singers and dancers, but when she drops out of sight.

That's because Brooke, the diva's makeup artist, is waiting along with a hairstylist and two wardrobe assistants to touch up Madonna's face and hair, and help her change into a new costume. The routine takes 90 seconds, tops.

"That's the most exciting part of the show - below the stage," Brooke says of four quick-change segments during each stop on the "Sticky & Sweet" tour. Madonna performs tonight and Wednesday at the Pepsi Center.

"If she doesn't get her boot on straight, I can't powder her properly, or she'll go on late and it can be a big issue," Brooke says. The support crew also gets a private show by Madonna during the changes. "She's really funny and witty."

Sources: The Denver Post, MadonnaTribe