>> i'm a little bit country. >> and i -- ♪ i'm a little bit rock and roll ♪ . >> they gave me an interview in which marie talks about her remarriage to her first husband in vegas. >> we are grateful for what we have now and he is my best friend. we have history and my children love him. >> she talks emotionally about the death of her son last year. >> it doesn't heal. it just -- god gives you respites. you know, just little breathers. you know, he's my baby. >> donnie gives great advice to justin bieber about life after being a teen idol superstar. >> if i was justin bieber, what would you say? >> put on the seat belt. it's going to be a bumpy ride. >> and the pair of them also explain how they look so good after 40 years in the business. you admit to one dose of botox. >> oh, yeah. i tried it. >> this is a prime time exclusive of "piers morgan