Page Six reports that on Friday (April 15th), Jennifer Garner posted a video to Instagram to share a special birthday surprise she got just ahead of her 50th on Sunday (April 17th). Donny Osmond, who she loved as a child, approached her while she was out to eat. “My first (pre)birthday surprise was a doozy— the one and only, legend in his own time, object of my childhood adoration and devotion— @donnyosmond showed up to knock my purple socks off,” she wrote.