People have
NO IDEA what a one album wonder is
It doesn't mean it can never be topped or else every Artist in history is a one hit wonder...it means when they only found success with 1 album and then just disappeared.
Adele & Katy? Nope, even if their next albums pull a Spirit Indestructible, 19 & OOTB still exist.
Gaga? Again no, if BTW flopped with 6 Million sales, most Artists are dead and forgotten. I'm not at all a Gaga fan, but its true.
Kelly? Yet again, no. Thankful, All I Ever Wanted, and Stronger were all successful. My December even did pretty well considering it only had 1 Single. They "failed" when you compare it to Breakaway but she has still had consistent success.