Spotted looking cozy in NYC October 12: Gossip Girl’s Chace Crawford and country star Carrie Underwood, who dined à deux at Nobu, then hit hot spot Marquee to sip champagne and smooch in a secluded booth. “They were all over each other,” an eyewitness tells Us. The next night, they held hands during a double date with Crawford’s costar Ed Westwick at Italian eatery Del Posto. Are C and C seeing each other? A friend of the hot new couple tells Us they have been keeping their romance under the radar since July! They met in May, says the source, when Crawford, 22, introduced himself to the 24-year-old singer (her album Carnival Ride drops October 23) at West Hollywood's Hyde. After she and Dallas Cowboys QB Tony Romo split in July, things turned serious: text messages and dates in L.A. and Nashville. “He is a country fan, and she thinks he is so funny and sweet,” says the source. “It’s total love.”