With the death of the Bee Gees'Robin Gibb over the weekend, there's sadly only one Gibb brother left. Of the original Bee Gees lineup, Robin's twin Maurice passed away in 2003 while little brother Andy, who had worked primarily as a solo artist, died a few days after celebrating his 30th birthday in 1988. Now only Barry survives. Their career spanned 22 albums and 83 singles, but the group became know primarily as a "disco" group following the huge success of Saturday Night Fever in 1977. As a reminder that the Bee Gees originally achieved fame with their beautiful pop and rock songs, we've decided to honor them with some of our favorites from the '60s and '70s. R.I.P. Robin.