05/21/2012 03:57 am ET Updated May 29, 2012

'The 2012 Billboard Music Awards': Tributes To Whitney Houston, Donna Summer, Adam Yauch And Robin Gibb (VIDEO)

There were several tributes to fallen musical icons on "The 2012 Billboard Music Awards" (Sun., 8 p.m. ET on ABC), including an impromptu moment of silence for Robin Gibb, the Bee Gees singer who passed away the day of the broadcast. Natasha Bedingfield sang a beautiful tribute to Donna Summer -- at least until the voiceover started talking over her and they cut to commercial in the middle of the song.

Wiz Khalifa gave a shout-out to MCA (Adam Yauch) of the Beastie Boys before giving out the award for Best Duo/Group -- it went to LMFAO. Later, the hip-hop pioneer got a full tribute from Cee Lo Green and Goodie Mob. But the most moving tribute came for one of the greatest vocal artists in the history of popular music.

Whitney Houston posthumously received the Millennium Award. Her daughter Bobbi Kristina and sister-in-law Pat came up to accept on her her behalf. Houston was also honored by Whoopi Goldberg, with performances of her music by John Legend and her "Sparkle" co-star Jordin Sparks taking on her signature anthem, "I Will Always Love You."

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