Katy Perry (and her purple hair) made an appearance on American Idol tonight.
— Brianna (@BriannaInfinity) April 27, 2012
— Cameron (@xP_Swagger) April 27, 2012
Nice purple hair #KatyPerry!!
— sad (@summertimesyd) April 27, 2012
So #KatyPerry makes me want to dye my hair purple… Spice up my life a little bit?
— KG (@kegiles) April 27, 2012