Lisa Marie Presley’s daughter, Riley Keough, took to Instagram on what would have been her mother’s birthday to share a sweet post. Fans reacted with surprise. On what would have been Lisa Marie Presley’s 56th birthday, her daughter Riley Keough shared a tribute that illuminated their striking resemblance. The message that accompanied the photo of a young Presley was short, simply stating, “Happy birthday, mama.” The post captivated fans, who quickly pointed out the family likeness. “You look so much like your Mom & Grandpa,” one fan commented. Another was taken aback by the resemblance, sayin…