"Baby I Love U!" (stylized as "Baby I ♡ U!") is a song recorded by American singer Jennifer Lopez for her third studio album, This Is Me... Then (2002). It was written by Lopez, Cory Rooney, Dan Shea and John Barry and produced by Rooney and Shea. The song contains an interpolation of the theme for the film Midnight Cowboy (1969).

"Baby I Love U" is a pop and R&B ballad about unconditional love, with critics pointing out that it was inspired by her relationship with the actor Ben Affleck. The song was well received by critics who complimented Lopez vocals. Commercially, the song was as successful as the other singles from the album in the UK, where it peaked at number 3. In the United States, the song peaked at number 72 on the Billboard Hot 100, and reached the top thirty of the Mainstream Top 40 chart.

While recording her then-upcoming album, Lopez listened to blues and soul, the music she had often turned to while growing up. Using songs by Stevie Wonder, Luther Vandross and others as inspiration, she attempted to elicit a similar feeling in her own songwriting, claiming, "Those were just songs that made my heart sing," she said. "They just stay with you. ... I wanted to do something that's true to me and how I grew up, but I also wanted to make beautiful songs. So I'd listen to records from today and I would listen to records from back then, and [eventually] I'd go, 'That's what I want.'"

Among the songs on the album, "Baby I Love U!" was written, with the help of her longtime collaborator and friend Cory Rooney. "He's so talented," she said. "And he's so 'behind the scenes,' especially when it comes to me. He's really, really just dedicated to music for the pure love of music." "Baby I Love U!" was released as the album's fourth and final single on August 3, 2003 in the U.S.., and on March 8, 2003 in the UK.

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