J.Lo is an album.
J.Lo is the second studio album and most successful album to date by American entertainer Jennifer Lopez . Commercially , J.Lo became Lopez 's most successful album . The album was certified quadruple platinum in the United States , and became the sixth best-selling album of the year worldwide . The album 's second single , `` Play '' ( released on March 27 , 2001 ) , reached the top twenty in most countries and top five in United Kingdom .