4. George Harrison - 'What Is Life'
George Harrison surprised a lot of people by landing a couple of massive hits on the charts right after the Beatles broke up. "My Sweet Lord" hit Number One all over the world, while "What Is Life" proved almost as popular. Today, many people know it merely as a song from all those soundtracks: it's in This Is 40, Patch Adams, Goodfellas and many more. It's almost as ubiquitous as "Let My Love Open the Door" or "Solsbury Hill." The track is deceptively simple, and more layers become apparent the more often you play it.