JoJo developed an addiction to “love and validation” at one stage in her life. The 33-year-old singer – who released her debut single, ‘Leave (Get Out)’, back in 2004 – has admitted to developing “a full-blown addiction” to sex and stimulation during a relationship with a music producer. JoJo said in her new memoir, ‘Over the Influence’: “I was in a full-blown addiction to love and validation, sex and stimulation.” The pop star was willing to do “damn near anything” for the sake of her music career at one point in time. In fact, JoJo was even open to the idea of staging a romance purely for PR…