I'll go one step further...I will predict what each will be doing or accomplishing in/by 2020...
Rihanna: passes Mariah for the most #1's by a female artist evah, and looking to catch "The Beatles" 22 #1's. Also Rihanna develops her acting chops, gets nominated and wins a Golden Globe, and Oscar.
Rihanna also launches a fashion line that rivals J Simps and her massive clothing empire!
Beyonce: divorces JayZ, and starts her own music label. Becomes a mogul in her own right, and branches out to produce Movies, TV Shows, and Documentaries. Bey by then will be looking to snatch Oprah's weave, and crown as the Queen of the World!
Gaga: succumbs to Interscope's wishes, and produces a GP friendly Pop album...auto-tune in everything...the Album goes on to produce 3 #1's and everyone says Gaga is back. Though internally, Gaga is miserable. After the album's promotion n' tour, she leaves Interscope to form her own indie label, and not give a f*ck what anybody thinks anymore.
Katy: tries to go all singer-songwriter, and fails miserably with her next album...Katy switches gears n' turns to TV where she gets her own successful comedy sitcom...winning an Emmy along the way, proving she is more than a one trick pony.
Taylor: after 1989's massive success, Taylor re-evaluates her life. No longer caring for fame, and having to be fake. Taylor comes out as a lesbian, and retires to a massive ranch in California where she becomes a recluse.
