Hollywood.com quoted Epworth as saying that the singer immediately loved the track and "had the lyrics ready in her head when she drove over [to the studio]. Within 10 minutes, she put down most of the vocals. It was the most absurd thing. She's fast, but it was really quite phenomenal."
No word from the singer herself,who is presumably still relishing in the recent accolades '21' has amassed, including sales of more than 10 million albums and a second-straight year of topping iTunes' bestsellers list.