Even though Janet's videography doesn't get the credit it deserves from the newer generation, her videos were conceptually and visually well done. No wonder she got the Vanguard Award so early in her career.
No one has heard a voice like Ariana get big because no one has ever been this big with such a high voice in pop since probably Celine. She's a solid soprano, with an extremely strong and chesty upper range unlike a lot of sopranos.
Even though Celine is the highest possible female voice, lyric-soprano.
Which is why I said "mini-version". Gaga and Rih's controversies seem tame compared to what Madonna was doing. Ariana is a black hole of charisma and when you put her next to Mariah, she really pales in comparison.
In terms of sales and hits, Taylor looks like Ingrid Michaelson compared to Shania.