It doesn't have to be your favorite song (although some great karaoke songs can keep this process entertaining), simply. The easiest way to achieve the twang is to find it first by talking. Once you know what it feels like in your speaking voice, it's much easier to apply it to your singing voice. In general, the correct way to sing a country song is to sing with an accent that is precisely different from other types of music.
It's that simple to learn to sing country music, just master the fundamentals and soon you'll start impressing others with your great and emotional singing. I can sing Broadway tunes and songs like Unchained Melody, which has some very high notes, and I can tell you that you need to have good vocal control and a good tone to sing country music. If you took a good look at some of today's singers, you'll see that most of them come out of their comfort level to train in multiple genres of music to increase their capacity and create a sensitive singer's impact. You may need the help of a professional vocal coach or a good singing course to spot the differences in these accents; however, you may add another layer of complexity to your voice if you are able to master these accents when you sing.
You may wonder why you need to learn to sing country songs when you prefer to do jazzy or rock. Even if you don't want to sing country music, having the ability to sing this way can be a very important tool in your vocal toolbox. After you have mastered the ability to speak to a twang country, the next step is to make the transition to the world of singing. When you become familiar with how it feels when you speak, it will be much easier to apply it to your voice when you sing.
Aspiring singers who want to learn how to sing country should really understand that they need to know the basics first. Singing country songs is no different from singing other styles of music, the only difference is the accent associated with it. It's a powerful tool to have in your toolbox, even if you're not interested in singing country music. Once you learn to sing country by learning things like larynx control, proper breathing, and how to raise your soft palate, you can become a great singer not just in one style but in anyone.
If you're looking for ways to develop a country music sound in your singing voice, there are a few steps you should follow. It doesn't have to be your favorite song (although some great karaoke songs can keep this process entertaining), just choose one and try to sing it as if you were one of the characters you're trying to emulate from the last step.