The only position that matters is the number one slot and everyone knows it.

But the US GP, not even mentioning around the world, would be hard pressed to name 2 or 3 Mariah No. 1s, while they could easily name several Madonna hits (even ones that weren't no.1).

Maybe if the GP consisted of the middle-aged gay men on Madonna Nation, but you would be lucky to find any person walking down the street that could name anything other than Like a Virgin, Material Girl or Vogue. Most people would be able to name Hero, All I Want for Christmas is You and We Belong Together. Mariah's 1.1 billion Youtube views give her the edge

No one here is old enough to know lbr.

But you just named three. And add to that Like A Prayer, which had people singing along at the Super Bowl and shot up iTunes as a result. Also you can add Music.

Madonna.

LAV, MG, LAP & Vogue vs. Hero, Without You, AIWFCIY, ABMB, My All, WYB & WBT.
Mariah wins once again.

Also, Vision of Love and Fantasy Remix are both important since they are both credited for popularizing melisma and hip/pop collaboration, respectively.

What Madonna song have revolutionized music like that two?

Wow didn't expect this thread to go on for 9 pages LOL