On Rihanna's nightly set list? A cover of Prince's Purple Rain classic ''Darling Nikki.'' (Now through July 24)
2 of 12
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)
3 of 12
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)
4 of 12
A giant guitar isn't Britney Spears' only ride — her stage show also includes a Pepto-pink convertible. (Now through Aug. 8)
5 of 12
On stage, Taylor Swift plays five guitars, two banjos, a ukulele, and piano. (Now through Nov. 22)
6 of 12
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)
7 of 12
Katy in a frock with motorized spinning peppermints.
8 of 12
Katy demurely dotted with pink puff balls.
9 of 12
Katy belting in Candyland stripes and swirls.
10 of 12
Katy befeathered and bedazzled in a citrus rainbow.