Do not adjust your computer screens! The kaleidoscope of color you're about to witness is not only real, it comes courtesy of the scalps of our favorite ladies of pop. Though 2011 is almost over, the year brought with it a rainbow of wigs, drastic hair changes and subtle sultry styles: Lady Gaga sported many shades of green; Katy Perry traded in her signature black locks for blond, pink and blue; and Nicki Minaj wowed us with her follicle exploration of the color spectrum. Check out our collection of this year's most memorable 'dos. Did your favorite make the cut (pun intended)? Tell us below.