More and more hit recordings are featuring more than one performer. “In 1993, not a single tandem recording appeared among the 25 top sellers in the U.S. Five years back, there was just one such record in the top 10, and five in the top 25. Last year, two of the top 10 and four of the top 25 were recorded by multiple artists.” Recently though, “at least 10 of the Top 25 have paired performers — five in the Top 10 and three in the Top 5.”