Pop Airplay (also called Mainstream Top 40, Pop Songs, and Top 40/CHR) is a 40-song music chart published weekly by Billboard Magazine that ranks the...

This is a list of songs which reached number one on the Billboard Mainstream Top 40 chart in 2004. During 2004, a total of 12 singles hit number-one on...

Billboard Mainstream Top 40 chart in 2005. During 2005, a total of 13 singles hit number-one on the charts. 2005 in music "Mainstream Top 40: Jan 01, 2005"...

of 40 songs. "Top 40" or "contemporary hit radio" is also a radio format. Frequent variants of the Top 40 are the Top 10, Top 20, Top 30, Top 50, Top 75...

This is a list of songs which reached number one on the Billboard Mainstream Top 40 chart in 2006. During 2006, a total of 15 singles hit number-one on...

The Mainstream Top 40 airplay-based chart debuted in Billboard magazine in its issue dated October 3, 1992, with rankings determined by monitored airplay...

This is a list of songs which topped the Billboard Mainstream Top 40 chart in 2001. During 2001, a total of 14 singles hit number-one on the charts. 2001...

This is a list of the U.S. Billboard magazine Mainstream Top 40 number-one songs of 2003. During 2003, a total of 16 singles hit number-one on the charts...

list of songs which reached number one on the Billboard magazine Mainstream Top 40 chart in 2002. During 2002, a total of 13 singles hit number-one on...

This is a list of songs which reached number one on the Billboard Mainstream Top 40 (or Pop Songs) chart in 2009. During 2009, a total of 20 singles hit...