A devastated Selma Blair has paid tribute to Hayden Panettiere following her death at age 36 – writing in one post: “I’m dying, Please be here.” The “Legally Blonde” actress, 54, posted three comments, reacting to the final Instagram snap the “Nashville” and “Heroes” star shared last month. “I love you. Don’t be gone. Don’t be gone. Please. Please,” Blair wrote in one post. “I love you whale tail my friend,” she penned in a second. “I’m dying. Please be here,” Blair wrote in a third post. Tia Mowry, known for her role in “Sister, Sister,” reacted to Panettiere’s death by posting a broken heart emoji. “Oh my god – heartbroken,” talk show…