Chace Crawford has honoured co-star Michelle Trachtenberg ... The Buffy the Vampire Slayer and Harriet the Spy star was found by her mother at her apartment near Columbus Circle just after 8am.

“Michelle was one of a kind,” Chace Crawford, who played Nate Archibald ... and she’s also a mother,” Trachtenberg exclusively told Us at the time. “I think it’s just amazing what ...