Adele has topped the US Billboard album chart for a second week running with her album '21'.

The record has now sold an additional 168,000 copies since its release in the US, taking it past the half million mark.

'21' is now at number one on both sides of the Atlantic.

In the UK, Adele recently became the only living artist to tie the Beatles 1964 record of having two entries in the top 5 on both the UK singles and album charts.

Meanwhile, elsewhere on the Billboard countdown, Justin Bieber has two albums in the top-10 with 'Never Say Never: The Remixes' at number four and 'My World 2.0' at number eight. Mumford & Sons' 'Sigh No More' is currently at number three.

(by Holly Frith)