While in London for Jay-Z and Kanye West's "Watch the Throne" tour at the 02 Arena, Rihanna met up with "Bad Girls" M.I.A. The pair posed for pics and Rihanna posted them on her Twitter account followed by the caption, "Bad girls do it well."

M.I.A. is known for her hit songs like "Paper Planes," "XXXO," and "Bad Girls".  Rihanna is known for her "bad girl" demeanor offstage, so these two together is sure to stir up some trouble.  

Source: rap-up.com