-Raise Your Glass
-F***in' Perfect
-Blow Me One Last Kiss
-Try
-Just Give Me a Reason
Two of the songs were #1's, one was #2, and the others were top 10 so......
J Lo was over 30 at her peak with I'm Real, Jenny from the Block, Ain't It Funny, All I Have
Sia's like 40 and had a Top 10 and Top 20 hit....
Madonna was like 45 when she released Hung Up and Confessions on a Dance Floor and that was a huge success
Mariah was 35 when TEOM came out and We Belong Together smashed hard
It's not impossible. Katy Perry is still a huge force and there's not a ton of competition in the mainstream right now so I think she'll do just fine, as long as she doesn't serve Prism 2.0