Published by Billboard magazine, the data are compiled by Nielsen SoundScan based collectively on each single's weekly physical and digital sales, and airplay.
[3][failed verification] In 2007, eight acts achieved their first US number-one single, either as a lead artist or featured guest: Mims, Avril Lavigne, Maroon 5, T-Pain, Yung Joc, Plain White T's, Sean Kingston, and Soulja Boy Tell 'Em.
T-Pain, Justin Timberlake, Nelly Furtado and Fergie each earned two number-one singles, either as a lead artist or featured guest.
However, "Irreplaceable", which started its peak position in three issues the previous year, is credited to by Billboard magazine as 2006's longest-running single.
[2] Other singles with extended chart runs include singer Alicia Keys' "No One" which stayed at number one for five straight weeks.