"All I Have" samples "Very Special" by Debra Laws, who later filed a lawsuit in 2003 against Sony Music Entertainment for "misappropriating her voice" in the song and her name in the credits.

It received favorable reviews from music critics who applauded the chemistry between Lopez and LL Cool J.

[8] Recorded at The Hit Factory in New York City, the song was originally titled "I'm Good" and heavily samples Debra Laws's song "Very Special", written by Lisa Peters and William Jeffrey.

[8][9] Featuring LL Cool J, "All I Have" is a midtempo R&B and hip hop ballad about moving on after a break up.

On the track, Lopez decides to end her relationship due to her lover's infidelity,[10] while LL Cool J attempts to "make up" with her.

[11] Amy Sciarretto of PopCrush characterized Lopez's vocals as "cooed" and found the song to have a "classic feel", with LL Cool J heard rapping, grunting and pleading "Baby don't go" over a "subtle" urban beat.

[13] Tom Sinclair of Entertainment Weekly praised LL Cool J as being a "high-spirited guest" on the song,[14] while Sal Cinquemani of Slant Magazine wrote that both "playfully interpolate Debra and Ronnie Laws' 'Very Special'.

[17] Erika Ramirez of Vibe wrote that the song "deftly conceals Lopez's whispery sighs, but she still generates heat with partner LL on this effervescent collabo".

Years later, Lopez's collaboration with LL Cool J on his track "Control Myself" also peaked at number two, on May 13, 2006.

[30] The music video for "All I Have" was directed by Dave Meyers, and was shot in New York City in November 2002.

[9] MTV News revealed that Lopez and LL Cool J would be playing ex-lovers in the music video.

Upset at the relationship being over, he throws the key in the fireplace while a tearful Lopez gets help from her friends with her things.

[24] While analyzing her DVD The Reel Me, Jason Shawhan of About.com called it a "Christmastime breakup theme" and "a nice shout-out to "No Me Ames" in terms of its hyperexaggerated emotions, but the most notable aspect of the audiovisual experience is the Debra Laws's "Very Special" sample which runs counterpoint to the Lopez/LL Cool J interplay.

"[31] Lopez and LL Cool J performed "All I Have" on The Today Show for the episode dated December 6, 2002.

The performance took place during her concert at Kips Bay High School, Lopez's alma mater.

[34] Prince Royce joined Lopez on stage days later during another night of the residency, where the two performed "Very Special" and "All I Have".

[40][41] In March 2003, Debra Laws sued Sony Music Entertainment/Epic Records in the United States District Court for the Central District of California, claiming that the use of samples from "Very Special" without her consent (even though the writers of "Very Special" and Elektra Entertainment Group—successor to Elektra/Asylum Records, which had released the original recording of "Very Special"—had given their consent to the use of the samples) violated her statutory and common law right of publicity under California law.

In November 2003, Judge Lourdes Baird granted Sony Music's motion for summary judgment on the ground that Laws's state law claims were preempted by Section 301 of the United States Copyright Act.