Foxes

Louisa Rose Allen (born 29 April 1989), better known by her stage name Foxes, is a British singer and songwriter originally from Southampton and now based in London. She is best known for her featured vocals on Zedd's song "Clarity", which peaked at number eight on the Billboard Hot 100 and at number one of the US Hot Dance Club Songs. On January 26, 2014, they won their first Grammy award for Best Dance Recording at the 56th Grammy Awards for the same song.

source: Wikipedia