The song was released as a digital download on 25 September 2015. It received mixed reviews from critics and fans, particularly in comparison to Adele's "Skyfall". The mixed reception to the song led to <answer>Shirley Bassey</answer> trending on Twitter on the day it was released. It became the first Bond theme to reach number one in the UK Singles Chart. The English band Radiohead also composed a song for the film, which went unused.
What former Bond theme singer was the subject of extensive activity on Twitter when the Spectre theme was released?
Shirley Bassey