It's always good to check Romans 14 and 1 Corinthians 8 concerning issues such as this, as this is one of many "disputable issues" (Romans 14:1) Christians have different opinions and convictions about.
I've been exposed to music my entire life, so I got influenced by it at a very young age. As a result, there is constantly music running through my head even when I'm not hearing it. I just can't get away from it. There was actually a period of a few years, since the world of CCM (Contemporary Christian Music) opened up to me, that I believed I should only listen to Christian music that mentioned God or Jesus at least once, or heavily referenced church life, prayer life, and other "religious" topics, as I was hearing some folks in Christian circles imply that it was pretty much a sin to listen to anything else. I was much younger then, of course, struggling between somewhat "fitting in" while still hanging on to standards I was raised with. The teen and young adult years were troublesome times for me. I did play around with the local radio stations to listen to snippets of mainstream music for comparison purposes and to aid me in picking out similar-sounding Christian artists, and sought Christian music periodicals for "comparison charts" in my quest to build a Christian music library. Some years back, I started to study these issues regarding music and how they apply to the Christian lifestyle. I took it in, analyzed it with an open mind, and about 10 years ago arrived at a conclusion. I now listen to a wide variety of music from different eras, and constantly on the lookout for new things. I still listen to Christian music, but I also listen to some secular music, provided the content does not go against Biblical principles. I also thought about how this compares with the content found in TV programming/movies and books/periodicals. Many of the programs I watch (or reading material I read) contains nothing about God, Jesus, or Christian living, yet are still decent and moral as a whole, so there's nothing wrong with watching them. Therefore, applying this same principle, I find nothing wrong with wholesome secular songs. I know some may disagree, but everyone is different.
Here is a commentary dealing with Christians and the use of music, inside and outside of church settings. It's long, but worth reading in sections, so it's best to bookmark it to refer to later.
https://musingsonmusicinthechurch.wordpress.com/