Willow Smith is ready to follow-up her breakthrough smash hit single "Whip My Hair" with another one that'll rattle your speakers. The young act signed to Jay-Z's Roc Nation label drops off the dance-heavy "21st Century Girl" which she will be performing live on Oprah for the first time tomorrow (March 1). Listen to the new single from pop's brightest star below.

[Rap-Up]