In this rETrospective, Melissa Joan Hart looks back at her career through rare ET interviews, including on set of 'Clarissa Explains It All' and 'Sabrina the Teenage Witch.' The actress shares never-before-heard stories and behind-the-scenes fun facts, like going clubbing with Britney Spears when she guest starred on her show! Plus, memories from 'Can't Hardly Wait,' 'Drive Me Crazy,' 'Dancing With the Stars' and 'Melissa & Joey.' Fans can next see Melissa in 'The Bad Guardian,' premiering on May 18 on Lifetime.