Who was the first person Jennifer Lopez did a duet with?

Jennifer Lopez's first notable duet was with rapper Puff Daddy (now known as Diddy) on the song "Love Don't Cost a Thing," which was released in 2000. However, she also collaborated with Marc Anthony on the track "No Me Ames" in 1999, which is often considered her first significant duet. Both collaborations helped to establish her musical career.