JANET
janet. - 350,000 (1993)

KATY
Teenage Dream - 192,000 (2010)

This.

I Am... Sasha Fierce sold 482,000 first week and went to sell 3M in the US and 7.5M+ WW.

I can't find info on much Janet's Control sold first week, but it went on to sell ~6M copies in the US and 14M WW.

284,000 - The Eminem Show (due to a premature release, it managed to sell 284,000 copies and had only one day of official sales chart and it wasn't available on Walmart) - 1,322,000 - First week of full sales, The Eminem Show is DIAMOND in the US and has sold 20 MILLION worldwide.
745,000 - Britney
663,000 - Survivor
482,000 - I Am...Sasha Fierce

Originally posted by Honey This. I Am... Sasha Fierce sold 482,000 first week and went to sell 3M in the US and 7.5M+ WW.