The most surprising fact in last week's obits for Andy Williams was that his version of "Moon River" was never released as a single. The gorgeous ballad was Williams' signature song for 50 years. He even named his theater in Branson, Mo. (the Moon River Theater) after it.

But Cadence Records, Williams' record company from 1956 to 1961, questioned the song's youth appeal and discouraged the star from recording it. Williams moved onto Columbia Records, where he recorded the song in January 1962. But by then, two recordings of the song (by its composer, Henry Mancini, and by R&B hit-maker Jerry Butler) had become top 15 hits. Williams sang "Moon River" on the Oscars in April 1962 (where it won as Best Song). The following month, Williams' album Moon River & Other Great Movie Themes cracked the Billboard chart. Even without spawning a Hot 100 single, Williams' album was a fixture on the chart for more than three years.

Williams' rendition of "Moon River" isn't the only recording that everybody knows, even though it was never released as a single. Here are 10 more.

If you're under 50, you probably have no idea what a big star Andy Williams was in the 1960s and 1970s. The ultra-smooth singer and TV personality hosted the first seven Grammy Awards telecasts. In fact, producer Pierre Cossette was only able to sell the concept of the Grammys as a live telecast when he assured ABC that he could deliver a big star like Williams as host.

Williams, who died Tuesday at his home in Branson, Mo. at age 84, was in the vein of such crooners as Bing Crosby and Perry Como. He was just about the last singer in that traditional pop style to become a major star—not counting latter-day revivalists such as Harry Connick Jr. and Michael Buble.

"Gangnam Style," the loopy novelty hit by Korean pop star Psy, vaults from #64 to #11 in its second week on the Hot 100. The song, which The Village Voice called "an inspired piece of silliness," is shaping up to be this year's "Macarena" or "Rock Me Amadeus." That's no small feat:  Los Del Rio's "Macarena" logged 14 weeks at #1 in the summer and fall of 1996. Falco's "Rock Me Amadeus" spent three weeks on top in the spring of 1986. As you can see, the desire for escapist fare with a sense of the absurd is nothing new. All three of these songs were recorded in foreign languages (Korean, Spanish and German, respectively), which also shows that a playful spirit transcends language differences.

"Gangnam Style" ranks even higher on the Hot Digital Songs chart, which measures only sales. It leaps from #25 to #4 on that chart, based on sales of 188K copies. "Gangnam Style" is a global pop phenomenon. It has already reached the top 10 in Australia, Belgium, Denmark, Finland, the Netherlands, New Zealand and South Korea.

Dave Matthews Band lands its sixth #1 album on The Billboard 200 with Away From The World.  This puts DMB in a tie with Eagles for the most #1 albums by an American band in chart history. (Matthews was born in South Africa, but he formed the band in Virginia. Eagles came together in Southern California.)

Four other groups have notched six or more #1 albums, but they're not from the U.S. The Beatles have amassed 19 #1 albums, followed by the Rolling Stones with nine and Led Zeppelin and U2, with seven each.