For all of you that don't know, Rihanna dressed like marijuana last night and she looked pretty damn good doing so in an all-green outfit, floor-length veil, and a leafy bouquet. She celebrated at the 2012 Halloween Carnaval held at Greystone Manor Supperclub last night in West Hollywood.

Naturally, she was named Queen of the Carnaval. Rather than let Chris Brown take any more attention away from her night, RiRi took to her Instagram today to post what's left of her costume with the caption: "The morning after! Hello November."

She's topless. In bed. With the veil still on. Hello November, indeed.