Star sightings: Amy Morton, Regis Philbin, Derrick Rose

SEEN ON THE SCENE: TV legend Regis Philbin was spied hanging out with Food Network star Jeff Mauro as the Pork & Mindy’s co-founder cooked up his signature barbecue bacon burger using his new line of Pork & Mindy’s sauces. … “Chicago P.D.” castmates Marina Squerciati, Brian Geraghty and Amy Morton were among the first to check out the new Cantina 1910 eatery, the same night “American Pickers” reality TV personality Danielle Colby was in the restaurant. … The Bulls’ Derrick Rose was seen dining at RPM Steak and then — on another night — at Del Frisco’s on Oak Street, where (separately) the one-and-only Steve Harvey also was spotted having dinner. … Recent sightings at Chicago Cut Steakhouse included the Bears’ Kyle Long and (separately) rapper Ja Rule,  plus L.A. Clippers head coach Doc Rivers late-night supping with ex-Bulls coach Tom Thibodeau. …While in town for their big Wrigley Field concert gig, AC/DC’s Brian Johnson and Cliff Williams lunched at Le Colonial and dined at Gibsons on Rush.  … Former Illinois state treasurer Dan Rutherford slipped into Carmen Rossi’s newest spot — Pomp & Circumstance in Old Town — where the veteran GOP pol was overheard chatting about the solar projects he’s currently developing in California — plus plans for taking a large People-to-People Project group to Cuba next spring. … Gordon Clapp, who won an Emmy for his role as Detective Greg Medavoy on “NYPD Blue” (and currently appears on “Chicago Fire” here) dined at Harry Caray’s on Kinzie. … Hawks teammates Corey Crawford and Jeremy Morin enjoyed a night out at Bull & Bear. … Gladys Knight performed at a private event at the Hard Rock Hotel. … Radio folks Jason Cage from B-96 and Brady from KISS-FM were seen (separately) hanging out at Drop Lounge in Lincoln Park. … The Sox’s Chris Sales was spied lunching recently at Weber Grill in River North.