Frankly, I thought that it was The Bee Gees when I heard "I just want to be your everything" on the radio. Then the announcer said that it was Andy Gibb, the Bee Gees' little brother.
Andy Gibb had incredible success for a couple of years. He has huge hits and sold millions of records on his own. Unfortunately, he couldn't handle success and died very young in 1988.
P.S. Check out my blog for posts, podcasts and videos.