It's been a tragic year in the entertainment world, and the 2012 Billboard Awards paid tribute to four iconic musicians who passed away this year: Whitney Houston
, Donna Summer
, Adam Yauch
and Robin Gibb
. Billboard Awards cohost Julie Bowen
acknowledged Gibb's passing, which occurred earlier that day, saying, "His voice and music of the Bee Gees
will live on forever. Natasha Bedingfield
paid homage to Summer by ...