How do I use Siri to identify a song in iOS 8?

Apple has partnered with Shazam to give Siri the ability to identify songs in iOS 8. To use this new feature on your iOS 8 iPad, iPhone or iPod all you have to do is ask Siri something like "What song is this?," "What's playing?," or even "Name that tune" and Siri will pause for a second to listen and then respond with the title and artist. She will also give you an opportunity to purchase the song if it is available on iTunes.