<Tr> <Td_colspan="2"> <Ul> <Li> file </Li> <Li> help </Li> </Ul> </Td> </Tr> <Ul> <Li> file </Li> <Li> help </Li> </Ul> <P> "Don't Worry, Be Happy" is a popular worldwide hit song by musician Bobby McFerrin . Released in September 1988, it became the first a cappella song to reach number one on the Billboard Hot 100 chart, a position it held for two weeks . The song's title is taken from a famous quotation by Meher Baba . The "instruments" in the a cappella song are entirely overdubbed voice parts and other sounds made by McFerrin, using no instruments at all; McFerrin also sings with an affected accent . The comedic original music video for the song stars McFerrin, Robin Williams, and Bill Irwin, and is somewhat shorter than the album version . </P> <P> The Indian mystic and sage Meher Baba (1894--1969) often used the expression "Don't worry, be happy" when cabling his followers in the West . </P>

Who sing the song don't worry be happy