my uninformed opinion; I wouldn't be surprised if a decent number of celebrities aren't the most hard-working and party a decent amount. 2 things first I'm sure that behind the Aces and hard working underachievers there are those who are famous and don't mind coasting and trusting to luck for long stretches rather then looking for opportunities at every corner. Second having a family and being serious about being part of it probably limits your time significantly but there are those who don't have families or don't invest a decent amount of time in their families.