Usually there are break between eras and The Rated R/LOUD/TTT/UNA era has spawned 6 #1 singles, a #1 collab, by the end of probably 225 million in tour grosses and over 15 million sales.
I think it's Madonna with her third album, True Blue
3 US number 1s (LiveTo Tell, Papa Don't Preach & Open Your Heart) 3 UK number 1s ( Papa Don't Preach, True Blue, La Isla Bonita )
The album sold 25.000.000 copies worldwide
Wiki: "The global success of True Blue marked the first time Madonna entering the Guinness Book of World Records in its 1988 edition, where she was dubbed as the most successful singer for 1986. The album also held the record for number one in most countries, topping the album charts in a total of 28 countries around the world.True Blue was included in the Guinness World Records as the biggest selling album by a woman, with copies sold of more than 17 million until October 1990. Was also the world's top-selling album of 1986, as well the biggest selling album of the 1980s by woman and remains one of the best-selling albums of all time with sales of more than 25 million copies worldwide. Slant Magazine listed the album at number 60 on the list of "Best Albums of the 1980s" and stated that "True Blue was the album on which it became readily apparent that Madonna was more than just a flash-in-the-pan pop star."
