Britney drives me up the wall, says Justin

Justin Timberlake admits his girlfriend Britney Spears can drive him up the wall

The NSync singer says one of his ambitions is to get her to say the words: "I'm sorry."

He made the admission in the January issue of a mens' magazine.

"She is one of the most hardheaded people I know - in a good way," he said.

"It's funny how when you're with someone the things that you find attractive are also the things that drive you up the wall."

Timberlake also says he's best friends with his mum.

"I've done some stupid things, but there wasn't anything that I couldn't talk to my mum about," he said.

"She told me 'You're gonna do dumb things and you're gonna do great things. As long as you learn from them, that's all that matters.'"