'Fifty Shades' sequel breaks sales record

Sex sells, and everything 'Fifty Shades of Grey' hasn't stopped proving it.

EL James's sequel to 'Fifty Shades' series, 'Grey' has sold over 1.1million copies within a week of its release in the US.

Despite its undefined, the book which tells the erotic story from the billionaire undefined, has broken adult book sales record.

The record for a first-week sale for an adult title is currently held by Dan Brown’s 'The Lost Symbol,' which was published in October 2009 and sold 551,000 copies in its first week.

'Grey' was released last Thursday, undefined which was also Christian Grey's birthday.

Fifty Shades of Grey, Fifty Shades Darker and Fifty Shades Freed have sold over 125m copies to date.