Willow Smith Hits the Road

Step aside Justin Bieber ... Willow Smith is taking the UK by storm! The 10-year-old pop princess is the "Baby" singer's opening act on his European tour, and though JBiebs is still the star of the show, Willow has definitely been stealing quite a bit of his thunder!

While leaving the Merrion Hotel in Dublin, Ireland, on Tuesday, Willow was mobbed by young fans on her way to the O2 Arena where she and Justin were set to perform. Following closely behind were her big brother Jaden and her dad, Will Smith. "Ready to ROCK Dublin!!!" tweeted Willow excitedly before she stepped on stage.

It sounds like the Smith kids and Bieber have been having a lot of fun on tour. On Monday, Justin, 17, declared that his little buddy Jaden should join Twitter, posting "Jaden needs twitter." Just a short time later, "The Karate Kid" star's twitter account was up and running, with Jaden posting his first tweet: "Chillin with my bro @justinbieber."

Proving just how much Twitter power he wields, on Wednesday morning Justin posted, "everyone follow @officialjaden and get him to 500,000 followers today!" As of Wednesday afternoon, Smith has almost 225,000 followers. Not bad for a 12-year-old kid. Of course, now all he has to do is catch up to his little sister Willow, who's now nearing 600,000 followers!

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