IF brother JADEN can get a career boost from dad, then she`s sure as hell getting one too. She barely knows her times tables, but WILL SMITH`s daughter WILLOW is about to unleash her debut single. At just nine years old, the cheeky pre-teen already has enough attitude to rival KE$HA and RIHANNA. In her video for Whip My Hair, Willow covers a room with paint as she flicks her braids around, singing about "keeping the party jumping". Pal JUSTIN BIEBER has given the single a thumbs-up.