Mariah did not start to release albums in the 80's.. Mariah released her first album in June 1990... (1991,1992,1993,1994,1995,1997,1998,1999,2001,2002,2003,2005,2008,2009)

and now Madonna, started in 1983 (1984,1986, 1987, 1989,1990,1992, 1994,1995,1996,1998, 2000, 2001,2003, 2004,2005,2007,2008,2009)

Whitney: 1985,1987, 1990,1992,(1995,)1996,1998,2000,2001,2002,2003,2007,2009

Celine: 1981,1982,1983,1984,1985,1987,1990,1991,1992,1993,1995,1996,1997,1998,1999,2002,2003,2004,2007,

Madonna: 19
Celine: 19
Mariah: 15
Whitney: 12