Listen to Keeps Gettin' Better (Instrumental Session) [Originally Performed by Christina Aguilera] online. Keeps Gettin' Better (Instrumental Session) [Originally Performed by Christina Aguilera] is an English language song and is sung by Pop Stars United. Keeps Gettin' Better (Instrumental Session) [Originally Performed by Christina Aguilera], from the album Pure Hits - Vocal & Instrumental Sessions, was released in the year 2008. The duration of the song is 3:03. Download English songs online from JioSaavn.