Wladimir Klitschko, the former fiancé of Hayden Panettiere, paid tribute to the actress on what would have been her 37th birthday. Klitschko took to Instagram on Friday to honor Panettiere, who died at age 36 on Sunday. The former boxer thanked friends and fans of the Heroes star for their “incredible outpouring of love and support.” “Today is Hayden’s birthday. Instead of celebrating the way we had planned, today we celebrate her life, her spirit, and the love she brought into this world,” Klitschko wrote about Panettiere, with whom he shared an 11-year-old daughter, Kaya. “I want to thank all of Hayden’s fans, friends, and everyone who…
