Summer Music: Girls on Tour
On Rihanna's nightly set list? A cover of Prince's Purple Rain classic ''Darling Nikki.'' (Now through July 24)
Spaceships! Male alter egos! Wigs galore! It?s all in a night's work for Nicki Minaj. (Opening for Britney Spears now through Aug. 8)
Sugarland's touring light show uses half a residential block's worth of electricity...and can be run off an iPad. (Jennifer Nettles, left, with bandmate Kristian Bush, now through Oct. 22)
A giant guitar isn't Britney Spears' only ride — her stage show also includes a Pepto-pink convertible. (Now through Aug. 8)
On stage, Taylor Swift plays five guitars, two banjos, a ukulele, and piano. (Now through Nov. 22)
Katy Perry wears a dizzying 16 outfits total on her current California Dreams Tour. Seven of the pop chameleon's wardrobe changes happen over the course of just one song, ''Hot N Cold.'' Take a look at a few of them in the following slides. (Now through Sept. 17)
Katy in a frock with motorized spinning peppermints.
Katy demurely dotted with pink puff balls.
Katy belting in Candyland stripes and swirls.
Katy befeathered and bedazzled in a citrus rainbow.
Katy punching it out as the queen of hearts.
Katy shaking a tail feather.