I voted Katy but Beyoncé will be pushing 40 (she can always tour like Madonna and Cher). Gaga can reinvent herself, she's talented. Taylor can go back to Country/Pop, she's been in the game for 10 years now and the youngest of the group.. Still breaking records.
I can see Gaga and Katy disappearing by the end of the decade.
Rihanna is a wild card. She has youth and sex appeal, but I wonder how long she can keep ahold of that.
Taylor and Beyoncé will force their way to stay. I can see Beyoncé leaving voluntarily, and Taylor taking it back to country or work behind the scenes.
So not anytime soon then? Writers are always going to welcome a #1 smash from Rih, especially since others can't do it.
I mean, others don't really need number ones to sustain a career, but once she hits her 30s, radio will start to play her less, which means writers will send less songs.
Bey is already past her peak so she's definitely not gonna still be huge, but she'll still have some moderately successful albums.
Rihanna would probably still be around. Idk what is Katy gonna do when the pop hits she churn stop working. Maybe she'll go the more singer-songwriter route.
Taylor will probably be more niche and just do country/folk/rock or something and have some moderately good album sales.