What songs were number one in 2004? This is the full list of the US number one songs from the year 2004. There were a total of 13 US #1 tracks in the year 2004 starting with Hey Ya! by OutKast which went to #1 on 13th December, 2003 and remained at the top spot for 9 weeks.
The US song that was number one for the longest single run in 2004 was Yeah! by Usher which went to number one on 28th February, 2004 and stayed at the top slot for 12 weeks.