J.Lo is a collection of songs.
J.Lo is the second studio album and most successful album to date by American entertainer Jennifer Lopez . Musically , J.Lo is a pop album , which also encompasses genres such as R&B , Latin pop , retro and dance-pop . Commercially , J.Lo became Lopez 's most successful album . 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 `` Ai n't It Funny '' was released as the album 's third single on June 20 , 2001 .