Five years after her second album “Warrior” was produced, Kesha, now going by her birth name instead of the stage name Ke$ha, released her album “Rainbow.” At the age of 30, the pop star, known for her 2009 hit song “Tik Tok,” produced this heartfelt comeback album, an homage to her triumph over the trauma she faced during her career. For the last five years, Kesha has fought for creative control of her music and sued her longtime producer, Dr.