"Yeah!" is a song by American singer Usher. He co-wrote the song with Sean Garrett, Patrick J. Que Smith, Robert McDowell, LRoc, Ludacris, and Lil Jon. It also features guest vocals from Lil Jon and Ludacris, with the former also producing the song as well as incorporating crunk and R&B—which he coined as crunk&B—in the song's production. The song was released as the lead single from Usher's fourth studio album Confessions (2004) on January 27, 2004, after Usher was told by Arista Records, his label at the time, to record more tracks for the album.

"Yeah!" topped the US Billboard Hot 100 chart for twelve consecutive weeks, before being replaced by its follow-up single "Burn". "Yeah!" was the longest-running number one single in 2004, subsequently topping the year-end chart on the Hot 100. It was certified platinum by the Recording Industry Association of America (RIAA). The song received a similar response in other countries, topping in other twelve charts worldwide. It was certified platinum in several countries, including Australia, Belgium, Canada, Germany and Norway, and received a two times platinum certification in New Zealand. The song peaked in the top-ten in several Year-end charts.

...
Wikipedia