Watch Oprah Winfrey Nearly Give Gayle King a 'Heart Attack' with Surprise 70th Birthday Party

It looks like Oprah Winfrey pulled out all the stops for her best friend Gayle King's milestone 70th birthday celebration, making sure it was so special that her pal had absolutely no idea a party was being planned behind the scenes! On Saturday, Winfrey shared a video on Instagram that revealed the incredible moment she and King walked into the latter's surprise party -- and the CBS This Morning host's reaction was absolutely priceless. As shown in the clip, Winfrey, 70, and King, who turns 70 ...