Jennifer Lopez sent her fans into meltdown after teasing a very "big announcement" on Instagram on Tuesday.The Love Don't Cost a Thing singer revealed that she will be performing her new track, In the Morning, on Dick Clark's New Year's Rockin' Eve with Ryan Seacrest.MORE: JLo strikes a playful pose in tiny pyjamas JLo will be ringing in the new year with a whole host of talented co-stars, including Lewis Capaldi, Miley Cyrus, Nelly and Ciara.