Justin Bieber has splashed out on a $10.8 million mansion in the Hollywood Hills.

The 'Baby' hitmaker - who turned 18 last Thursday (01.03.12) - has treated himself to the lavish five bedroom, 9,400 sq ft home overlooking Lake Hollywood, which he wants to share with his girlfriend Selena Gomez.

However, the young couple can't move into the property just yet as Ashton Kutcher has been renting the palatial pad for $50,000 a month since his split from wife Demi Moore last year.

Along with splashing out on a new home for himself, Justin was also surprised with a luxury 2012 Fisker Karma electric car worth $100,000 by his manager Scooter Braun during a recent appearance on 'The Ellen Degeneres Show'.

Scooter said: ''You work really, really hard. I always yell at you don't get anything flashy. You know, we're not about that. Be humble, be humble and I kind of broke my own rule.

''So we wanted to make sure you were environmentally friendly and we wanted to make sure since you love cars that when you're on the road you are always environmentally friendly and we decided to get you a car that would make you stand out.

''I think you know where I'm going and you're kind of freaking out right now.''