In an exclusive interview, Lester Holt interviews Oscar and Grammy winner Jennifer Hudson whose new book I Got This, hits shelves January 10. The two talk about her weight loss and healthy living tips as they cook together; Hudson also discloses details of her upcoming nuptials, the Julian D. King Gift Foundation she started in her nephew’s honor, and more.

Also on Dateline Sunday, secrets in a small town can only stay hidden for so long. Keith Morrison reports on the story of Teresa Mayfield, a mother of three who was found dead in her car off a lonely dirt road. Two years after her death there was still no arrest in the case. But then,  strange sequence of events led investigators to an unlikely suspect.

Join us for a two-hour Dateline Sunday beginning at 7pm/6c.