American pop star Jennifer Lopez\'s new single, \"Dance Again,\" is to premiere this week on Ryan Seacrest\'s radio show, Epic Records said Wednesday. \"Dance Again,\" featuring Pitbull and produced by RedOne, is to have its world premiere Friday. The song will be available on iTunes Monday with the video set to debut April 5 on TV\'s \"American Idol\" for which Lopez is a judge and Seacrest serves as host. Lopez, Pitbull and RedOne previously collaborated on the hit song \"On the Floor,\" the video for which has gotten more than 500 million hits on Vevo.