. >> maybe that's why rob reiner cast his mom estelle for a small but climactic moment. >> oh, god. >ed was singing as carl wrote something his wife loved until the day she died in 2008. why did you decide to write about the last moments of her life? >> because it was so beautiful. he is tell died at 94, she was 94, last year of her life was lying in bed. it was -- she always thought she was going to go back and sing. and she couldn't really get out of bed. she had major problems. >> she was here. >> her mind was always there. at the last moment she wasn't even breathing a breath every minute. a little something. and we touched her nothing. i said, lucas she should go out lovely like her last album. i put on, first song was "hey, you're adorable" that was playing. i said, play it up loud. ♪ b your so beautiful ♪ d is your charm. >> she'll here it as she's going. and we played it loud. one of the hospice nurses, she had such a lovely sweet voice. lucas went up to mom, she says you have a lovely sweet voice. and estelle passed away. her lips said thank you. i had to write about that. be