@hollywoodlife: Blake Lively is mourning the loss of her former Gossip Girl co-star Michelle Trachtenberg, who passed away at 39. In an emotional tribute, Lively described Trachtenberg as “fiercely loyal” and full of life, recalling her passion, fearlessness, and attention to detail. Trachtenberg was found unresponsive in her New York City apartment and later pronounced dead. While the official cause remains unknown, she had recently undergone a liver transplant. Lively reflected on the tragedy, urging others to appreciate the time they have with friends. 📷Getty #blakelively #michelletrachtenberg