Want to dress up like Katy Perry for Halloween but don't know which look you want?  See different options in our two-part series and find out where to get everything you'll need.

Image: EMI

Katy's cupcake ensemble in the "California Gurls" music video is one of the most popular choices and the easiest to recreate.  Click here for everything you need, including a blue wig, cupcake bra, shorts and shoes.

Image: Facebook

Katy decided to portray a different character, Kathy Beth Terry, in her music video for "Last Friday Night (T.G.I.F.)," so why not dress up like her nerdy alter ego?  While this costume will require several pieces, here is a guide to all of the accessories you will need. 

Image: Christopher Polk/Getty Images

Walk on the wild side with this adorable Katy Perry look from New York Couture.  The dress retails for $120.  Purchase it here. 

Featured Image: Ian Gavan/Getty Images

Katherine Epstein (@RTNowRadio) for Cumulus Media © 2012