"Sales projections for the album have risen consistently in the past few weeks, and for a few days this past week it was rumored that Swift might grab the best sales week ever for an album released by a woman.
That crown is still worn by Britney Spears, who sold 1.319 million copies of her album Oops…I Did It Again back in 2000. While Swift may not have beaten Britney’s all-time record, she is outselling the diva ten to one these days. Spears’ last album Britney Jean only managed to move slightly more than 100,000 copies in its first week last November, and has long since been forgotten"
Source:
http://www.forbes.com/sites/hughmcin...ts-first-week/