How many copies did the single " We Are Never Ever Getting Back Together " sell in the UK as of January 2013 ?
" Firework " is one of five of Perry 's songs to top 5 million paid downloads , the others being " Hot n Cold " , E.T. , " California Gurls " , and Roar , and she is the first artist in digital history to sell 5 million or more copies of four different hits .