Simplify the following text for a Grade 5 native English-speaking person.
Original: Andy Gibb ( 5 March 1958 â `` 10 March 1988 ) was a British singer and teen idol , and the youngest brother of the family whose other members formed the Bee Gees : Barry , Robin , and Maurice Gibb .
Simplified: Andy Gibb ( March 5 , 1958 â `` March 10 , 1988 ) was a pop singer popular in the 1970s . He was the younger brother of Barry , Maurice , and Robin Gibb , The Bee Gees .