In reply to King B.

That's not Janet's peak sales. She did 900,000 with The Velvet Rope and 1,200,000 with the Janet. album. Plus her sales aren't even documented properly out of all the legends. Music Box is Mariah's only album to do anything close to those #'s on average she sold a lot less. Her first 2 albums and Rainbow sold 300,000. Merry Christmas did 100,000. Daydream, Butterfly and TEOM did 600,000. Madonna and Whitney sold the most. Madonna did 1.9 million with True Blue and 1.8 million with Ray Of Light. Whitney did 2.2 million with the Whitney album and 2.1 million with the Bodyguard. I believe Janet and Mariah are more popular in Japan, which is the 2nd largest music market.