Competition among the top music stars such as Whitney Houston and Mariah Carey have occurred. These two stars are very popular at the time, either because their top sell music albums, also the singers voice is very qualified.
The success of these top music stars are indeed worthy of the singer as a reference for other singers. At that time the success as musical star if their music album can be sold out maximal. This is quite different from singers today who seem more concerned with success in acting on the musical stage.
Mariah Carey managed to sell their music album reached a figure which is fantastic when success sold out to 16 million pieces. But then overtaken by a Whitney Houston song album which is sold out reach to 45 million pieces. From the count of successful albums sold, it is clear how much money that could be expected received by the top singers of this music.
This is very different from today's singers usually only have 1 or 2 songs are sung in a music album that is not possible in a single album sung by one singer. This might be due to the current situation is not supported by many songs album become pirated, in the form of VCD or can directly down-loaded from the Internet. So that the singers are lazy to work create new songs, because the result will only be plowed.