Miley Cyrus & Rihanna AIDS Charity Fashion They Went Too Am-Far

10/30/2014 6:42 AM PDT

Miley Cyrus & Rihanna at AIDS Charity ... They Went Too Am-Far

Miley Cyrus and Rihanna showed up Wednesday night to a Halloween party in Los Angeles dressed as high-class escorts. 

Wait, it wasn't a Halloween party? It was the 2014 amfAR Inspiration Gala, a charity benefit for AIDS research?  

Oh ... our mistake.