So the answer is no, she is not a good role model. Aspiring to her talent and using her as a role model are two incredibly different things. A role model should be someone you can apply to all aspects of life.
Janis Joplin was talented, but she's about the worst role model a person could choose.
I don't know who Kesha is, but after googling her and seeing that she hasn't killed herself with her lifestyle I'd go with Kesha. Her music sucks, but at least she's alive.
Yeah, but Drugs aside. Wouldn't rather have a role model who ACTUALLY had talent? One that didn't write "party jingles" and needed auto tune like it was cocaine?
Janis Joplin was talented, but she's about the worst role model a person could choose.