Personnel includes: Jennifer Lopez (vocals); Ja Rule (rap vocals); Troy Oliver (various instruments, programming); Mario Winans (various instruments, background vocals); Rodney Jerkins (various instruments); Rene Toledo (electric & 12-string guitars); Frankie Romano (guitar); Ed Calle, Dana Teboe, Tony Concepcion, Angel Fernandez, Raul Agraz, Ozzie Melendez (horns); Nelson Jaime (piano); Jimmy Greco (keyboards, programming); Archie Pena, Mark Quinones, Bobby Allende (percussion); Cory Rooney, Jose Sanchez (programming); Jeannie Cruz, Lena Perez, Manny Benito, Ramiro Yehran, LaShawn "Big Shiz" Daniels, Karen Anderson, Nora Payne, Shalene Thomas (background vocals).

Producers include: Rodney "Darkchild" Jerkins, Sean "Puffy" Combs, Ric Wake, Soulshock, Karlin.

Engineers include: J.C. Ulboa, David Swope, Robert Williams.

Japanese version features the bonus track "I'm Waiting."

Jennifer Lopez' sophomore effort is anything but sophomoric. With J-LO the actress/singer conquers the jinx to create a catchy array of R&B, salsa, and dance music. With her hand deep in the cookie jar this time around, Lopez, along with Cory Rooney, co-writes and co-produces every track.

The first single, "Love Don't Cost a Thing," burned up the urban radio stations with its smooth and catchy hooks. Steering clear of the obvious loops and samples, most tracks are original, save the Sean "Puffy" Combs produced "Walking on Sunshine," which employs the '80s tune made famous by Katrina & The Waves. Lopez runs the spectrum of lyrical subjects, covering love, in the aforementioned "Love Don't Cost a Thing," dance, with "Play," and trying to make the best out of confusing romantic situations, in "We Gotta Talk."