J.Lo is the second studio album and most successful album to date by American entertainer Jennifer Lopez. It was released on January 23, 2001, by Epic Records. Preceding the release for the follow-up of her commercially successful debut album On the 6 (1999). On this album, Lopez had more creative control over J.Lo. Its title refers to the nickname her fans gave her, and she described it as a homage to her supporters. Lopez began recording the album under the working title 'The Passionate Journey', writing lyrics that focused on her own personal experiences. For the album, she hired producers such as Cory Rooney, Troy Oliver, Dan Shea and Sean Combs, (her boyfriend at the time), all of whom contributed to her first album. Musically, J.Lo is a pop album, which also encompasses genres such as R&B, Latin pop, retro and dance-pop. It was considered more daring than On the 6, including more explicit language and provocative lyrics about sex; it also deals with themes of empowerment and relationships.
Upon its release, the album received mixed reviews from music critics, who criticized its manufactured sound, although some praised its Spanish songs and dance material. Commercially, J.Lo became Lopez's most successful album. The album debuted at number one on the US Billboard 200, on the same week as her film The Wedding Planner, opened at the top of the domestic box office, making her the first entertainer to have both a number one film and album simultaneously. The album was certified quadruple platinum in the United States, and became the sixth best-selling album of the year worldwide.
" Love Don't Cost a Thing" was released as the album's lead single on December 2, 2000, which reached the top five in the United States and number one in United Kingdom. The album's second single, " Play" (released on March 27, 2001), reached the top twenty in most countries and top five in United Kingdom. The Latin pop song, titled " Ain't It Funny" was released as the album's third single on June 20, 2001. " I'm Real" was serviced to radio as the album's fourth and final single on September 4, 2001. To further its success, record executives at Epic recruited Ja Rule of Murder Inc Records, who is popular in the Urban market, to create a remix of the song, "I'm Real (Murder Remix)". The remix, which featured Ja Rule, shifted Lopez's personal style from pop to a more hip-hop and urban-oriented sound. It was the number one song in the United States at the time of the September 11 attacks for 5 non-consecutive weeks.