Credit: Instagram: Rihanna Photo: Rihanna Is Topless in Bed After Halloween on November 1, 2012

You know it was a crazy Halloween when you're still wearing your costume the next morning. You know it was an even crazier Halloween when you're wearing your costume and you’re topless. 

Doing just that is superstar Rihanna, who posted a photo of herself on Instagram this morning (November 1) in which she’s wearing her green headpiece from the night before and not wearing a shirt.

As for what she did to celebrate the holiday? The Barbadian singer hosted a Halloween bash at Greystone Manor in West Hollywood, with famed guests such as her on-and-off boyfriend Chris Brown (who had quite the offensive costume on), and Paris Hilton.  

While Rihanna basically dresses in costume year-round, for the spooky night she wore all green and was apparently dressed as marijuana. Looks like she and Lady Gaga had the same smoke-tastic idea!

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Source: Rihanna's Instagram

Follow Alissa Kombert on Twitter @AyeKayArt.