Rihanna says she is not worried about the first week album sales

Rihanna has said that she is not worried about the sales of her new album.

Rihanna's fifth studio album Loud was released internationally this week, will open to sales of 180,000 in the US - 10,000 less than her previous album Rated R.

While discussing the sales Rihanna said: "Never have I ever stressed out on the first week. Ever since Good Girl Gone Bad, the first week was like 160,000, and it grew to sell nine million albums.

Rihanna"The first week never determines what the success of the album will be."