"Ain't It Funny" is a Latin pop song written by American singer-songwriter Jennifer Lopez and Cory Rooney for Lopez's second studio album, J. Lo (2001). It was produced by Rooney and Dan Shea and was released as the album's third international single in the autumn of 2001.
"Ain't It Funny" (Murder Remix) is a pop/R&B/hip hop song written by American singer-songwriter Jennifer Lopez, Ja Rule, Caddillac Tah, Ashanti Douglas, Irv Gotti, Cory Rooney, and 7 Aurelius for Lopez's remix album, J To Tha L-O!: The Remixes (2002). It was released in 2001 as the album's first single. The song was also included on the album Irv Gotti Presents: The Inc. as well as Ja Rule's compilation album Exodus.It also refers to Lopez's early single "Love Don't Cost A Thing".
