Best selling female artists! Receipts from Guinness Book.
Keep in mind folks, we're specifically talking about ALBUMS here.
As of October 2013, Madonna had sold an estimated 305,600,000 albums.
Although precise sales figures are difficult to obtain and are often disputed, it is acknowledged that only The Beatles, Elvis Presley and Michael Jackson have conclusively sold more albums worldwide than Madonna.
All other females who have total worldwide album sales estimated at 200 million units:
Among female artists, Mariah Carey (USA),
Celine Dion (Canada) and
Whitney Houston (USA, 1963-2012)
Still impressive tho. 
