Check out this video. One of the three bee gees brothers is losing it on top. Great song though!
Unless they all pinned persian rugs to their chest, a poster from back in the day shows they all have ample amount of chest hair for a body hair transplant.
On closer inspection however, 2 of the 3 brothers are actually losing it.
Note the guy on the right is thinning up top :
Its definately a rug :
Still though, they were a great band.