Hayden Panettiere had been looking forward to spending her 37th birthday with her daughter, Kaya, before her untimely death on Sunday. “She was planning on spending the week of her birthday visiting her daughter in Germany,” a source close to the “Nashville” alum told Page Six exclusively. “She was so excited to see her and was telling everyone how much she was looking forward to spending time with her.” Panettiere would have turned 37 on Aug. 21. Page Six previously reported that the “Heroes” star had been making plans to see Kaya, 11, and can now reveal the trip was intended to coincide with her birthday week. Panettiere’s hairstylist…
