List of Billboard Mainstream Top 40 number-one songs of 2006List of Billboard Mainstream Top 40 number-one songs of 2007List of Billboard Mainstream Top 40 number-one songs of 2010List of Billboard Mainstream Top 40 number-one songs of 2011List of Billboard Mainstream Top 40 number-one songs of 2012List of Billboard Mainstream Top 40 number-one songs of 2013List of Billboard Mainstream Top 40 number-one songs of 2014List of Billboard Mainstream Top 40 number-one songs of 2015List of Billboard Mainstream Top 40 number-one songs of 2016List of Billboard Mainstream Top 40 number-one songs of 2017List of Billboard Mainstream Top 40 number-one songs of 2018List of Billboard Mainstream Top 40 number-one songs of 2019List of Billboard Mainstream Top 40 number-one songs of 2020List of Billboard Mainstream Top 40 number-one songs of 2021Mainstream Top 40