List of Mainstream Top 40 number-one hits of 2004 (U.S.)

This list of number-one hits on the Mainstream Top 40 charts in 2004. They were published by the U.S. magazine Billboard. This year there were twelve leaders.

OutKast - Hey Ya! 9 weeks (December 13, 2003 - February 13, 2004 )

3 weeks ( February 14-March 5 )

2 weeks ( March 6 to March 19 )

4 weeks ( March 20-April 16 )

3 weeks ( April 17 to May 7 )

3 weeks ( May 8 to May 28 )

8 weeks ( May 29 to July 23 )

5 weeks ( July 24 to August 27 )

5 weeks ( August 28 to October 1 )

2 weeks ( October 2 to October 15, a total of 4 weeks)

2 weeks ( 23 October to 5 November, a total of 4 weeks)

Jessica Simpson Toxic (song) Usher (entertainer) The Reason (Hoobastank song) Avril Lavigne Tim McGraw List of number-one Billboard Mainstream Top 40 hits List of Billboard Mainstream Top 40 number-one songs of the 1990s List of Mainstream Top 40 number-one hits of 1993 (U.S.) List of Mainstream Top 40 number-one hits of 1994 (U.S.) List of Mainstream Top 40 number-one hits of 1995 (U.S.) List of Mainstream Top 40 number-one hits of 1996 (U.S.) List of Mainstream Top 40 number-one hits of 1997 (U.S.) List of Mainstream Top 40 number-one hits of 1998 (U.S.) List of Mainstream Top 40 number-one hits of 1999 (U.S.) List of Mainstream Top 40 number-one hits of 2000 (U.S.) List of Mainstream Top 40 number-one hits of 2001 (U.S.) List of Mainstream Top 40 number-one hits of 2002 (U.S.) List of Mainstream Top 40 number-one hits of 2003 (U.S.) List of Mainstream Top 40 number-one hits of 2005 (U.S.) List of Mainstream Top 40 number-one hits of 2006 (U.S.) List of Mainstream Top 40 number-one hits of 2007 (U.S.) List of Mainstream Top 40 number-one hits of 2008 (U.S.) List of Mainstream Top 40 number-one hits of 2009 (U.S.) List of Mainstream Top 40 number-one hits of 2010 (U.S.) List of Mainstream Top 40 number-one hits of 2011 (U.S.) List of Mainstream Top 40 number-one hits of 2012 (U.S.)

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