Miley Cyrus has treated herself to a brand new Mercedes convertible - even though she's too young to drive it.

The 15-year-old pop sensation doesn't turn 16 until November 16th but she's already bought herself a gift - a $75,000 white Mercedes-Benz Clk 550 Cabriolet.

A source tells In Touch magazine, "Miley wanted special options like parking assist and a cream-coloured leather interior, so she ordered the car early."

"She's telling everyone that she hopes to get a car when she turns 16, so when it comes, she can say it was a surprise from her parents."