::: repeating :::
Janet has not sold anywhere near 150 million albums.

Janet Jackson / Dream Street = 500k
Control = 14 million
Rhythm Nation = 14 million
janet. = 20 million (although I dispute this figure, but I'll go with it)
Design of a Decade = 6 million
The Velvet Rope = 10 million
All For You = 7 million
Damita Jo = 2.4 million
20 Y.O. = 1.2 million
Discipline = 900k
Number Oness = 275k

Total = 76.275 million albums sold.
Short of 100 million, and well short of 150 million.