"J.Lo" includes the Spanish songs "Cariño", "Si Ya Se Acabo" and "Dame (Touch Me)". "Cariño" is described by Lopez as a "cha-cha" inspired composition, with lyrics that refer to love and affection. "That's Not Me" is a dramatic song about self-empowerment with an arrangement consisting of an acoustic guitar and piano, as well as "skittering syncopations, layering half-speed vocal lines over double-speed runs". The album also features romantic ballads, which "Rolling Stone" and "Slant Magazine" drew comparisons with Jackson. "Come Over" is a song about "forbidden lust", whilst "Secretly" features Lopez singing about a "guy whom she can smell across the room".