In addition to Celine Dion, who has had significant success on this chart, other artists with multiple number ones on the AC chart in the 1990s include Mariah Carey, Phil Collins, Michael Bolton, Whitney Houston and Shania Twain. Newer female singer-songwriters such as Sarah McLachlan, Natalie Merchant, Jewel, Melissa Etheridge and Sheryl Crow also broke through on the AC chart during this time.

What milestone did Celine Dion, Mariah Carey, Phil Collins, Michael Bolton, Whitney Houston and Shania Twain share on the 1990s adult contemporary charts?