Dig up last-minute costume inspiration from this gallery, which lists "ingredients" you need to mimic popular Internet sensations (with links to sale sites, many of which'll put the giddyup on delivery), from YouTube hits like the Keyboard Cat (baby blue onesie, portable keyboard, cat ears) and doped-up David After Dentist (seatbelt, Florida Gators t-shirt, teeth blackener), to web celebs like the unapologetic Australian party kid (yellow wig, clip-on nip ring, obnoxious sunglasses) and Vince the ShamWow guy, for which they suggest just a headset, polo, and ShamWow, because you'll have to look local for hookers to bite you.

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