In this exclusive clip, Nia Long breaks down while sharing her story about being a single mom and being raised by a single mom in Brooklyn on Oprah's Lifeclass. Airing tomorrow night at 9 p.m. ET/PT on OWN, Oprah Winfrey and spiritual life coach Iyanla Vanzant gather an audience of single moms to discuss the hardships facing single mothers across the country. In addition to Long, celebrity guests will be Tyler Perry and OWN reality show star and comedian Kym Whitley.