The whipped cream Katy Perry costume from her "California Gurls" music video is sweet!  Get the whole costume here and swing by the grocery store for some cans of whipped cream to add to your outfit.  

Image: Dave Hogan/Getty Images

You can still dress up like Katy and keep it simple with the gumball dress that she wore to the BBC Teen Radio Awards last year.  The dress can be purchased on Amazon.com.  Since Katy rocks different colored wigs, try any one of these black, pink, light purple or blue wigs.

Image: Jon Kopaloff/Filmmagic

No matter which Katy Perry costume you choose, you can always add colorful streaked clip-in extentions.  Real human hair extentions can be ordered online here.

Featured Image: EMI

Katherine Epstein (@RTNowRadio) for Cumulus Media © 2012