Nicki sold more records (about 25.000.000) than Kim ! And Nicki has a short career ! On Twitter I saw that Kim sold 4.3M of albums (w/ 5 ALBUMS) and Nicki sold of albums w/ only 2 albums!!!! ... plus Nicki is still promoting her new album and ppl are still buying them. ;) ! and dont forget that with Itunes and all that its not as easy to sell albums nowadays as in the 90's !!