Willow Smith's '21st Century Girl' -- the follow-up to her smash hit 'Whip My Hair' -- premiered this morning on the 'On-Air with Ryan Seacrest' radio show.

Willow Smith's sophomore single is just as confident as her debut hit, and it starts right from the beginning. "Gimme an inch, I promise I'll take a mile," she boasts in the single's first line, before explaining the definition of a '21st Century Girl.' "Danger is beauty, I'll face it with a smile / I'm on a mission with no restrictions / Don't second guess myself, I'm born to be wild."

"I set the boundaries, the rules don't own me/I'm living life on the edge, I choose my path," Smith sings in the second verse.

The 10-year-old daughter of Will Smith and Jada Pinkett Smith released her second single just in time for her spring European tour supporting Justin Bieber. '21st Century Girl' will also hit iTunes exclusively tonight [March 1] at midnight, and will be followed with her first television performance of the song tomorrow on 'Oprah.'

While there is still no word on the official release date for her debut album, Smith teased on Twitter last month saying, "It's coming soon........VERY soon!!" One thing we already know is it will feature at least one song with her dad's old partner in crime, DJ Jazzy Jeff.

After watching 'Whip My Hair' soar to No. 1 on the iTunes UK chart, No. 5 on Billboard's R&B/Hip-Hop Songs chart, and over 25-million views on YouTube, we understand why the young protege has all of the confidence in the world. What do you think? Is '21st Century Girl' another hit?

Listen to Willow Smith's '21st Century Girl.'