Sometimes when we're driving or we can't give our undivided attention to looking at our phones, Siri makes it super convenient to get things done. The Music app is no exception and Siri can interact with it in lots of ways, including playing specific songs.
How to play a single song with Siri for iPhone and iPad
Press and hold the Home button on your iPhone or iPad to launch Siri.
Say something like "Play Bad Romance by Lady Gaga."
If there are multiple matches, Siri may ask you to confirm which song you want to play.
The Music app will start playing the given song.
That's all there is to it! While you don't always have to say the artist name, it's helpful and cuts out having to confirm something with Siri, especially if the song title you're requesting is common. Give it a try and let me know in the comments how it works for you!