Rihanna covers up in khaki coat and thigh-high boots during late night outing

                  
She's rumoured to be planning a major musical comeback.
But Rihanna was trying to keep a low-profile as she headed home on Thursday night following a day spent at the recording studio in New York City.

The Diamonds singer tried to go incognito in her casual look, pulling her grey woolly dress up over her face. See more pics after the cut.......