Bonus points if you can do it while playing a song with your elbows or something. Chopsticks = 5 points; Fur Elise = 100 points; any arrangement of Al Green = 5,000 points.
We already know that Siri can rap, but its musical talents don't end there. In this video, Craig Knudsen shows how he hacked Siri to play the piano. His iPhone is stocked with MIDI song files which, when prompted by Siri, are sent wirelessly to a Yamaha Disklavier, a piano able to receive MIDI commands.
As a neat touch, when you say "If you can play it for her, you can play it for me. Play it again, Siri," Siri will play the iconic Casablanca piece "As Time Goes By," so you can have both hands free to drink your gin and moon over your bittersweet memories of that one time you were in Paris.