Will Smith's nine-year-old daughter, Willow, has signed a record deal with rapper Jay-Z's label Roc Nation.

Her first single, Whip My Hair, has already been viewed nearly a million times on YouTube since its release in the US this week.

Jay-Z told US radio host Ryan Seacrest he thought she would be a "superstar".

"I heard the record first before I knew it was recorded by a nine-year-old and I was like, 'man that record's a smash'."

The rapper, who compared Willow with a young Michael Jackson, said: "She has a child's innocence but she has a clear vision of who she is and who she wants to be."

However the rapper - who signed R&B artist Rihanna when she was a teenager - brushed aside suggestions that the nine-year-old may be too young to launch a music career.

If you ever needed proof that pop music is more about image than talent, Rihanna's it

She sounds robotic before the Autotune prog kicks in