Actor Jason George stops by to chat about "Grey's Anatomy." Jennifer then welcomes 6-year-old Winter Duboc and her 4-year-old sister Sky Duboc from Miami, Florida. The siblings went viral for their weightlifting and fitness videos, which have earned millions of views. Their parents, Michelle and Franco Duboc, began posting videos while Michelle was pregnant with Sky to inspire families to stay active. Now, Winter and Sky love working out with their parents and promoting a healthy lifestyle. Don't miss when the sisters show off their weightlifting skills!