Timberlake and Will.i.am are being sued for stealing “Damn Girl.” And I’d say they’ve got a big problem. Justin Timberlake and Will.i.am (William Adams) are facing an infringement suit over “Damn Girl,” their collaboration from Timberlake’s very successful “Futuresex/Lovesounds” record. That record is a decade old. And this case was filed in 2016. But after …