8. Kesha, 'Rainbow'
Kesha's road to Rainbow was long and dimly lit, but she came through on the other side to create the best music of her career thus far. From Dolly Parton and Eagles of Death Metal features to a Ben Folds songwriting credit, the "Praying" singer had some of the industry's finest on her side to help craft an immersive showcase of not only her sweeping range of influences but her long under-appreciated vocal abilities as well. This is Kesha at her most free, making beautiful, hopeful art out of years of trauma.