Byline: By BETH NEIL

MOVE over Britney Spears and clear off Christina Aguilera - you're, like, soooo yesterday's news.

There's a new teen idol on the block, her name's Hannah Montana and if you've never heard of her you're probably a) over the age of 14 or b) haven't got any kids.

To the world's tweenagers she's the greatest thing since Britney pranced about in her school uniform to Baby One More Time.

Last week Britain's tweens (10 to 14-year-olds) went crazy when they heard she was coming to the UK for a one-off gig, with more than 100,000 children jamming switchboards. And her self-titled CD is poised to go platinum.

Hannah is even bigger back home in America where she has sold more than two million albums and had seven singles simultaneously in the American Billboard chart - Elvis could only manage three.

It started last year with a Disney Channel comedy drama. Hannah Montana tells the story of shy 14-year-old brunette Miley Stewart, a typical young girl trying to navigate her way through adolescence.

There are boy troubles, homework stresses, zit worries and the pressures of keeping in with the in-crowd to contend with. All everyday stuff.

But wait. Miley is no ordinary teenager. When she dons her blonde wig, she transforms into international pop megastar Hannah Montana.

As Hannah, she travels the world, mixes with the rich and famous and is adored by millions of fans.

None of her classmates knows about her double life. The wig acts as a cunning disguise.

Aimed at six to 14-year-olds, the show has exploded beyond TV into the charts, fashion and even video games.

Hannah Montana...