While partygoers eat and drink downstairs, chart-topping crooner Michael Bublé hides in an upstairs bathroom! After an hour and a half, it's finally time for his big entrance.
"I asked one of my friends to show up here tonight, because I think you can't have a good party unless you have really great music," Oprah says.
Guests cheer as Michael emerges from his hiding place to sing a few tunes. He gets the party swinging with "Call Me Irresponsible" and "Save the Last Dance for Me" before the night comes to an end.
"I wanted to propose a toast to all of our neighbors and to our special neighbor across the street, Oprah Winfrey," Scott says. "Thank you so much."
Adrianne and Scott don't send their neighbors home empty-handed. Everyone leaves with a "Party in a Bowl" to remember the fabulous drinks, food and new friends.