Jack Dorsey

Companies: Twitter founder and Square CEO

Occupation: Web developer and Entrepreneur

Net Worth: $1.13 billion (estimate)

Age: 35

Jack Dorsey sits at the head of two exciting and extremely popular startups, Twitter and Square. He is often known to be one of the greatest young innovators. Dorsey was once found telling that he spends 8- 10 hours a day at Twitter and also 8- 10 hours a day at Square, which gives him just four to six hours of sleep every night, this can even reduce when other factors like time to travel is considered.

Kelly Ripa

Age: 41

Occupation: American actress, talk show host, and television producer

Ripa is known to be a night owl and early bird, she is popular for her talk show and she also takes care of her family with three children. Ripa owns a production company along with her husband Mark Consuelos. According to an interview, Ripa falls asleep at 1 am midnight and wakes up at 6.15 for her regular chores of work.