Ha ha ha! Are you serious? She was just a tool in the entire movement. Lil' Jon was the pioneer and the mastermind, producing or being featured on seemingly every hip-hop record from about 2003-2005. Think back to "Get Low" or "Yeah!" Those songs predate Ciara by almost an entire year.
You mean '96/97 when "Who U Wit" came out. "Get Low" and "Yeah" pretty much popularized it.