The title has significant meaning to the singer. “We all have special numbers in our lives, and 4 is that for me,” she told Billboard. “It’s the day I was born. My mother’s birthday, and a lot of my friends’ birthdays, are on the fourth; April 4 is my wedding date.”
The project, described as a “mixed musical gumbo,” was recorded in the span of a year starting in spring 2009. It is preceded by the Major Lazer-sampled single “Run the World (Girls).”
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