The video captures the moment when several classmates surprise the two middle-aged men with a birthday cake ... "Oh my god. Love the crowd. So pure, beautiful, and good-hearted.

Gayle King is "still floating" from a surprise party that best friend Oprah threw for her in New York. Guests included Katy Perry and Tina Knowles.

Hard thing to surprise her, O the stories we have made up, the lies we have told to keep this a secret," Winfrey captioned a video of the big reveal on Instagram. "Happy birthday @gayleking, sorry ...

King said she was "hoping" the surprise 70th birthday bash would be something Winfrey would "have for herself," but quickly added, "I was so glad it was me" Stephanie Wenger is a TV Writer ...

Oprah pulled off a surprise for best friend Gayle King's 70th birthday that was so good ... When King noticed the crowd gathered for her, she threw her purse on the bar and hobbled back in ...