Now Playing: Neil Cavuto’s Personal Perspective on Multiple Sclerosis
Now Playing: Meredith Vieira, Richard Cohen on battle with MS
Now Playing: Actress Selma Blair reveals MS diagnosis on Instagram
Now Playing: Happy birthday, Ginger Zee!
Now Playing: ‘Glass’ star Samuel L. Jackson on the advice he’d give his younger self
Now Playing: Carol Channing dies at 97
Now Playing: ‘Bachelor’ host Chris Harrison shares his predictions for Colton
Now Playing: Selma Blair gets candid about life with MS in emotional Instagram post
Now Playing: Selena Gomez returns to social media after a four-month break with some inspiring words
Now Playing: Serena Williams cruises to victory at Australian Open
Now Playing: David and Tamela Mann discuss new album and memoir
Now Playing: Kane Brown performs ‘Lose It’ on ‘GMA DAY’
Now Playing: Michael and Sara’s shower song
Now Playing: Ask Michael and Sara anything…seriously, anything
Now Playing: World record egg breaks the internet
Now Playing: Chrissy Teigen’s 007-themed party for John Legend
Now Playing: NFL’s First Female On-field Playoff Game Official!
Now Playing: Kane Brown performs ‘Good As You’ live on ‘GMA’
Now Playing: Tamela and David Mann open up about their new book on ‘GMA’
Now Playing: James McAvoy dishes on ‘Glass’ live on ‘GMA’