Celebrity Dads on Fatherhood

Celebrity Moms and Dads sound off in a special feature on AOL:

Dad's side
"The best thing about fatherhood for me has been the actual challenge of it. Never before have I been so tested in life, sport, anywhere. All three of my kids keep me on my toes constantly!"
-- Lance Armstrong, dad to Luke and twins Isabelle and Grace (InStyle)

"When she started coming out, I got lightheaded. I had to sit down. There's nothing like that in the world. When she started crying, I said, 'Karsen, it's okay,' and she just stopped crying. She knew her name."
-- Ray Liotta, dad to Karsen, 8 (InStyle)