Oprah Winfrey Tells Justin Bieber to "Rethink" Marrying by 25 If Oprah Winfrey personally told you not to do something because it was a bad idea, would you listen? That's what Justin Bieber is going to have to decide. In her upcoming interview with the Biebs airing this Sunday night on OWN, she tells him he's crazy for wanting to get married by the time he's 25. In a preview clip of the interview posted on Entertainment Tonight's website, Winfrey asks if it's true that the 18-year-old singer really wants to tie the knot by age 25. When Bieber says, "I think so, yeah," Winfrey tells him, "Rethink that, will you? Bieber asks, "Why?" Winfrey replies, "I think 25′s too young, actually. I really do - and particularly for you. RELATED: Nicki Minaj on "Idol" Debut, Justin Bieber Winfrey explains to Bieber, "Your whole 20s is about discovering who you really are, and you owe that to yourself, particularly because of the business that you're in, there's not a lot of self-discovery time because so much is already defined for you." "Well, we'll see when we get there," Bieber replies, and goes on to tell Winfrey that he also wants "a handful" of kids. Winfrey tries to pin him down, saying, "So, you were gonna get married at 25 but now you're gonna rethink it because I'm telling you to?" Bieber smiles and says, "Yeah, I mean, you are Oprah, you are telling me I should not get married at 25, I should probably listen to you." "You maybe should," Winfrey agrees. Winfrey's entire chat with Bieber airs Sunday, Nov. 25 at 9 p.m.