Jennifer Lopez on Saturday night performed at the 2015 iHeart Radio Music Festival in Las Vegas. As usual the 46-year-old absolutely slayed while performing  some of her hits — ‘On The Floor’, ‘Booty’ and her 2002 classic, ‘Jenny From The Block’. Watch her performances below… httpv://youtu.be/TnCu5Cd-4Lk httpv://youtu.be/dR60f2gWjxQ httpv://youtu.be/9Yw8Dx2kUOY