In sales or opinion?
Top 20 Country Countdown - 2004 Top 20 Lovin' and Leavin' Songs was released on: USA: 9 February 2011
Billboard has listed the week's top songs for decades and does to this day. The website not only lists the top 20 songs of the week, but also information about the artists and links to purchase music.
10 on Top - 2010 2011-08-20 was released on: USA: 20 August 2011
VH-1 Top 20 Video Countdown - 1994 2011-05-20 was released on: USA: 20 May 2011
106 and Park Top 10 Live - 2000 2011-04-20 was released on: USA: 20 April 2011
106 and Park Top 10 Live - 2000 2011-05-20 was released on: USA: 20 May 2011
106 and Park Top 10 Live - 2000 2011-06-20 was released on: USA: 20 June 2011
You can find the 20 video countdown either on the internet or on VH1. The top 20 countdown is on the top 20 music videos or songs that artists have made.
Austin and Ally - 2011 Future Sounds and Festival Songs 2-20 is rated/received certificates of: USA:TV-G
CMT Top 20 Countdown - 2001 CMT Top 20 Countdown 11-27 was released on: USA: 8 July 2011 USA: 8 July 2011
Fuse Top 20 Countdown - 2010 2011-04-12 was released on: USA: 12 April 2011
Fuse Top 20 Countdown - 2010 2011-04-19 was released on: USA: 19 April 2011