Jennifer Lopez "Ain't It Funny" Remixes 2001 Maxi CD 6712022000 Song: Ain't It Funny (Brandnew Extended Remix) Sung by: Jennifer Lopez Written by: Jennifer Lopez & Cory Rooney Produced by: Cory Rooney & Dan Shea Single: Ain't It Funny (Remixes) Genre: Pop Recorded: April 2000–October 2000 Single Release Date: June 20, 2001 Format: CD Track: 3 of 5 ℗ 2001 Epic Records, Inc. .