These ladies can be considered the female artists with the most number ones so far. And all three are from different generations. Does that mean we'll see a new pop girl who churns out constant #1 hits in the near future.
Most artists don't smash with singles this hard at that age (or 16) Let alone for 10 years straight.
That doesn't mean an older artists won't acquire a lot of number ones themselves. She has the record of being the youngest but I'm talking about scoring a lot of hits overall.
Ciccone and Carey peaked in different eras but they are from the same generation.
And also from their generation with many #1 hits: Whitney Houston, Michael Jackson, Janet Jackson, etc. From the previous gen.: Stevie Wonder, The Supremes, Beatles, etc. They usually come in clusters. The only era that doesn't have a #1s crew is the late 90s/00s. Usher is the only one from that era that has more than 5 or 6 if I'm not mistaken.