the release of the album made the itunes website stop working. this happened because there were so many people on the website at once for the album. timbaland, justin timberlake, and pharrell williams are producers of songs on the album. the album got good reviews. "xo" was released as the first single from the album. on december 21, 2013 the album will be released on cd and dvd in the united states. "billboard" chose the album as the best of 2013.