Miley Cyrus, Hilary Duff, Fergie: 15 Celebrities Who've Dressed Up as Other Stars (PHOTOS)
On Halloween, even the stars wanted to dress up as other celebrities.
Sporting a skin-tight, leopard print catsuit, Cyrus, 19, partied into the night as American Idol judge Nicki Minaj.
As for DeGeneres?
The talk show host stepped out for her opening monologue dressed as pal Sofia Vergara. Sporting the Zuhair Murad teal gown the actress wore to the 2012 Emmys, DeGeneres, 54, even put on her best Colombian accent to channel the Modern Family star.
Who else dressed up as their Hollywood pals for Halloween? Launch the gallery to see more celebrities who've channeled other stars.