ELLEN DEGENERES
The talk show host, whose past get-ups include Sia, Nicki Minaj and made-up reality star Karla Kardashian, took her inspiration from “The Bachelor” this year, going as fictitious contestant Kelllly D., a buxom dental assistant from New Jersey. This time around, she may have been outdone by guest Rebel Wilson, who went as Wilson the volleyball from the 2000 Tom Hanks movie “Cast Away.”