Avril has the receipts, but Kelly has the longevity.
Thankful was released not long after her AI win. Back then, people thought of her as a karaoke singer. She still had two major hits from the album.
Breakaway was where she proved she was a pop star in her own right. It went 6x Platinum in the US and has 5 smashes.
My December had no promo due to her label not approving of the album. It still sold 2 million WW and had a hit single.
AIEW and Stronger were both equally big eras with 2 smash hits each.
Greatest Hits kinda flopped, but it's a greatest hits album.
Piece By Piece flopped, but still went #1 and has a top 20 single. It's seeing a Revival (

) now with Piece By Piece (song) likely going top 10 this week.