Cameron Diaz and Jason Segel sparked dating rumors when they were spotted dining at Nick & Toni’s in the Hamptons the other night. Sources tell us they came in with another man, with one spy adding, “They arrived late and had to wait for a table, and then were seated outside on the patio. They were casually dressed and seemed to be very comfortable chatting.” Diaz and Segel next month will start filming the movie “Sex Tape,” about a husband and wife who make a racy video that goes missing.