India, Jan. 12 -- Actor Hrithik Roshan turned 52 on Saturday, and his girlfriend actor-singer Saba Azad marked the day with an adorable Instagram post. Sharing a series of candid pictures from their time together, Saba offered fans a glimpse into their relationship. In a heartfelt caption, she wrote, "Nothing in the world makes me happier than seeing you happy. On the best day of the year I wish upon you joy and days of quiet, rest intercepted with days of fulfilling creation, work that deserves your talent, books that make you think, time with your friends and family and peace, endless peace. Happy birthday my heart. I love you @hrithikroshan."htc...