Rihanna: 'UK Thuggin' is My Secret Weapon!'

Rihanna steps out of her hotel showing off her toned body in a sheer outfit on Thursday (July 18) in London, England.

The 25-year-old entertainer also rocked her new gray hair, which she debuted hours before in a series of Instagram pics.

PHOTOS: Check out the latest pics of Rihanna

“London I love you! #UKthuggin in my secret weapon @adamsellman fit #brrr” RiRi wrote on her Twitter account that same day.

15+ pictures inside of Rihanna rocking her sheer outfit and gray hair in London…