 "Shake It Off" is a mid-tempo R&B and pop song with a hip hop backbeat and a "thumping", sparse production.Written and produced by Carey, Jermaine Dupri, Bryan-Michael Cox and Johntá Austin, the song drew comparisons to several productions from Usher's 2004 album, "Confessions".According to the sheet music published at Musicnotes.com by W.B.M.