Willow Smith joins Justin Bieber on his European tour; Will they whip their hair?

Please, please let there be a "Whip My Hair" duet. Justin Bieber's hair was meant to be whipped. It's his hair's destiny.

In news that is sure to make tweens jump up and down in excitement, thus tilting the world's axis, 10-year-old singer Willow Smith (and Will and Jada's daughter) just tweeted, "Got news that my big bro @justinbieber invited me on his European Tour in March..so exciting! Maybe I'll let Jaden come..LOL #NEVERSAYNEVER"

Bieber, a.k.a. "Big Bro", tweeted her back moments later saying, "@officialwillow get ready...i got more surprises coming. #MYWORLDTOUR.

We are now taking your guesses in the comments as to what surprises the wonder that is Bieber has in store. We're guessing another huge tween star will be joining these two on tour, perhaps Selena Gomez?

This is a smart move by Bieber's camp as Smith's hit single "Whip My Hair" just hit No. 1 on the UK iTunes charts. The "My World" tour kicks off on March 4 with two nights in Birmingham. This is the first time the 16-year-old Canadian sensation will hit the UK, leading us to wonder: Can Bieber-fever top Beatle-mania? The world will soon find out.