THAT Mary Carey is returning to adult movies with “Celebrity Pornhab with Dr. Screw,” a spoof of VH1’s “Celebrity Rehab with Dr. Drew,” out June 2 from Red Light, which peddled the notorious Paris Hilton–Rick Salomon sex tape . . . THAT reggae star Sean Paul will perform for an intimate crowd of 100 at the Sunglass Hut in Herald Square Tuesday to launch the retailer’s new kiosks . . . THAT Yankee centerfielder Brett Gardner and Linda Ruth Tosetti, granddaughter of Babe Ruth, read baseball-theme books to sick kids at New York-Presbyterian Morgan Stanley Children’s Hospital.