I never even knew about the Cha Cha Slide until 2009. I think it was DJ Casper who sang it (was he named after 'The Friendly Ghost'?). Heard the song at a couple of parties, but haven't since. I hate that song a lot.
And I thought I read somewhere (Wikipedia, maybe?) that the song dated back to around 1996? That may explain why the song sounded so 1990's.
I never even knew about the Cha Cha Slide until 2009.
The reason why "Cha Cha Slide" sounded very 1990s was because it was actually released on August 2,1998. Many dance songs around that time period basically had the same beats, including the 1999 remix of Earth Wind & Fire's "September". Certain beats would be recycled by many different artists during a period of a few years. The beats on "Cha Cha Slide" were not heard much on any new songs by 2002.