Beauty is pain!
Rihanna was working the pajama trend in London on Thursday.
The Battleship starlet made her way into the Mandarin Hotel wearing a printed lace blouse and pants from Stella McCartney's pre-fall collection, sandals and some funky cat-eye sunnies.
While she looks very comfy, we're not really feeling the whole "going to bed" look.
[Image via Pacific Coast News Online.]