Madonna: Oprah Series Finale Guest!

Madonna makes a surprise appearance during the Surprise Oprah! A Farewell Spectacular held at the United Center on Tuesday (May 17) in Chicago, Ill.

“I think it’s her spirit,” the 52-year-old singer told E! “I think it’s the fact that she really is a compassionate human being. She’s entertaining, but she wants to help people.”

Katie Holmes, Halle Berry, Queen Latifah, Will Smith, and Jada Pinkett Smith were all a part of the giant lovefest to celebrate Oprah‘s series finale.

Beyonce even performed her new single “Run the World (Girls)!”

FYI: Madonna is wearing a Miu Miu dress.