Oprah visits multiplatinum artist and actor LL Cool J and his family at their home in Los Angeles for a rare interview. The star of "NCIS: Los Angeles" talks about how his marriage to Simone and his family made him the man that he is today. Oprah asks LL's children to finish this sentence: "The best thing your father ever taught you was…" Check out LL's adorable reaction to their answers! Watch "Oprah's Next Chapter" on Sunday, Jan. 27 at 9 p.m. ET on OWN.