The 10-year-old 'Whip My Hair' hitmaker - whose parents are Hollywood stars Will Smith and Jada Pinkett Smith - has revealed she is joining forces with the teen singing sensation for the European leg of his 'My World' tour in March.
She joked that perhaps he will even let it become a Family Affair and allow her 'Karate Kid' star brother Jaden tag along.
Willow 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. (sic)"
Justin then confirmed the news, adding fans attending his tour can expect plenty more surprises along the way.
He tweeted: "more surprises coming. (sic)"
Willow - who has received a phenomenal response to her debut single in the US and the UK - recently expressed her hopes to become as big as Lady GaGa in the future.
She said: "I would like to be a very well known artist. I would like to be as big as Lady Gaga. I would like to be bigger. I'd like to be a big rock star."