"Yeah!" combines the genres of crunk and R&B genres, to form Crunk&B, which Lil Jon described as "R&B songs that get you crunk, make you wanna wild out". "Entertainment Weekly" Jem Aswad found the song to contain crunk and transition between hip hop, soul and ballad genres. The song was co-written by Sean Garrett, Patrick J. Que Smith, Ludacris, Robert McDowell, and James Elbert "LRoc" Phillips. According to the sheet music published at Musicnotes.com by Sony/ATV Music Publishing, "Yeah!" is written in common time with a moderately slow tempo of 105 beats per minute, It is written in the key of G minor. Usher's vocal range spans from the low note of B3 to the high note of B4.