Selma Blair has shared her heartbreak over the death of fellow actress Hayden Panettiere. The Heroes actress died on Sunday (Aug 16) at the age of 36 and the news was confirmed in a statement from her father Alan. Police in South Carolina said an investigation is underway but there are no "signs of foul play". Selma has shared her agony in a series of emotional messages posted on Instagram. The Cruel Intentions star added a comment on Hayden's final Instagram post, which was uploaded on July 27, writing: "I love you. Don't be gone. Don't be gone. Please. Please." She later added: "I love you whale tail my friend," before writing: "I'm…