As part of the Bee Gees, the late Robin Gibb's impression on the Billboard Hot 100 will be felt forever. The trio racked up nine Billboard Hot 100 No. 1 singles -- more than any other group in history save for the Beatles (with 20) and the Supremes (12). Of their chart-topping hits, their biggest is "How Deep Is Your Love," which reigned for three weeks in 1977 and spent 33 weeks on the chart -- the group's longest-running single.
