BTW, I only counted Studio Albums as eligible, that is why Gaga, for example has 3 albums & not 4.
I didn't count EPs, Compilations, rereleases, remix albums, live albums, etc., otherwise most of these people wouldn't be here because EVERY release isn't certified Gold or platinum by the RIAA.
Madonna - 5x Platinum Like a Virgin - Diamond True Blue - 7x Platinum Like a Prayer - 4x Platinum Erotica - 2x Platinum Bedtime Story - 3x Platinum Ray of Light - 4x Platinum Music - 3x Platinum American Life - Platinum Confessions on a Dancefloor - Platinum Hard Candy - Gold MDNA - Gold