The full single was first released as a download - only single .
The full single was first went on to become one of the fastest songs to reach 1,000,000 downloads , as well as becoming the 3rd - highest - selling download debut single for a female artist .
The full single was first released as a download - only single and went on to become one of the fastest songs to reach 1,000,000 downloads , as well as becoming the 3rd - highest - selling download debut single for a female artist .