Katy Perry is no stranger to rocking bold beauty looks back-to-back (to-back, to-back...). We've been tracking this California girls' tweets and found keeping up with her outrageous hair color switches a bit easier. Here are a few of her best beauty tweets:

•July 30th: "HOUSTON... I done teased my hairs up just for you cause in Tehas everything is BIGGER & BETTER! Thanks for the GREAT night! I love you!"

•July 25th: "I have been dying my hair since 10pm! Good GOD let me get to my destination tonight! #beenblack #beenblue #beenhotginge #beenblonde #now..."

•July 24th: "Smurf nails! Duh! [twit pic]

•June 17th: "If I don't wait 3wks, I'll end up w/no hair or a #pixie90scutw/abarretteinthefront. It's okay, I'll get to my secret color(s) soon! #patience"

•June 17th: "So I didn't get to the exact color I wanted from being black for so long! 2get to goal I have 2b GINGER for 3WKS #paybackfromGINGERGodsFML!"

•June 16th: "tonight I dye my hair a different color... Can you guess which color?!"

•April 29th: "In honor of the Royal Wedding, I present you... My royal NAILS! CONGRATS!" [twitpic]

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