The Billboard Hot 100 is widely considered to be the definitive all-genre singles chart in the US. Since it was launched in 1958, well over 1,000 songs have reached the coveted No. 1 spot ...

Here, then, is a Top 10 of recent shocking moments… In 2006, Gnarls Barkley's Crazy became the first song to top the charts on download sales alone, but it was also released physically ...