The rumor mill was kicked into gear when a photo of the two was published online. ASB reports that the photo shows the two stars "with their backs towards the camera, facing the recording consoles with their right arms raised."

The site reports that it was Lopez's sister Lynda that posted the photo on Twitter with the message, "Uh oh...walked into the studio to find this: @JLo @robinthicke ...can't be nothing but trouble... :)."