The Billboard Hot 100 is a chart that ranks the best-performing singles of the United States. Its data, published by Billboard magazine and compiled by Nielsen SoundScan, is based collectively on each single's weekly physical and digital sales, as well as airplay and streaming. In 2013, a total of 11 singles claimed the top spot in 52 issues of the magazine. One of which, "Locked Out of Heaven" by singer Bruno Mars started its peak position in late 2012.