One of the cool new iOS 8 features of Siri is its integration with Shazam allowing you to use it to quickly identify which song is playing. All you have to do is to launch Siri and say the phrase “What’s this song” and it will quickly use Shazam’s music recognition service to display the name of the song along with its price tag in the iTunes Store.
UntetheredHeySiri: Jailbreak tweak lets you use ‘Hey Siri’ hands-free activation without being plugged in
Apple added a really useful feature to Siri, that lets you activate it hands-free just by saying “Hey Siri.” The feature sadly works only when your device is plugged in.
Siri gained the ability to identify songs by listening to them in iOS 8. What went relatively unnoticed was that iOS stores a history of all the songs recognised, that you can see.