One still photograph survives from that night in 1962 when Marilyn Monroe famously sang a seductive "Happy Birthday" to President John F. Kennedy at Madison Square Garden. The picture, from an after-party in New York, shows Monroe with JFK and his brother Robert F. Kennedy. It's the only known photo of Monroe and JFK together, shot months before Monroe's death in Los Angeles. It went on display at the Art & Artifact Gallery in West Hollywood Tuesday night — Monroe's birthday. Video from ABC's "Good Morning America" after the jump.