He continued to have a successful career , with some highlights such as singing the Crowded House track " Do n't Dream It 's Over " at the Nelson Mandela 70th Birthday Tribute in 1988 , producing a popular duet , " Senza una donna ( Without a Woman ) , " with Italian blues singer Zucchero in 1991 , and singing " Radio Ga Ga " with the surviving members of Queen in 1992 , at The Freddie Mercury Tribute Concert soon after Freddie Mercury died . In 1991 , he recorded a duet with Irish group Clannad for the Blake Edwards film '' Switch '' , a cover of the Joni Mitchell song , " Both Sides Now "
Nelson Mandela 70th Birthday Tribute
Nelson Mandela 70th Birthday Tribute
Paul Young