Sorry but All of Mariah's albums have NOT outsold Whitney's. The bodyguard stands at about 40+ million and none of Mariah's albums prior to 1999 sold anywhere near the amount that Whitney's first three album sold. Whitney and Mariah both have two albums in the top 50 selling albums of all time and considering the fact that Whitney only trails Mariah by about 10-20 million shipments according to OFIICIAL RIAA certifications (not the MC website) and Whitney released FAR LESS albums than Mariah, Whitney's sales PER ALBUM are greater than both Mariah and Celine.