Taylor Swift surprises a couple and sings at the engagement party

Taylor Swift shocked a group of people celebrating their engagement by walking with his guitar and serenading them.

Alex Goldschmidt and Ross Girard On Saturday night, friends invited friends to Sycamore Tavern in Hollywood, when Alex announced he had a friend who would help them commemorate the night. He said that she called Taylor, but no one had any idea what was going to happen.

Taylor came out, people were stunned and she played "King of My Heart" from her album Reputation.

Suffice to say that … it was an event rich in events and very successful.