I listen to music. I don't label it secular or Christian. I label it as: classical, oldies, rock, gospel, hymns, worship, R&B, bluegrass, jazz, big band, alternative rock, polka, shoegaze, rap, easy listening, metal, show tunes, movie scores, etc., etc.
Just because a song is played on the Christian radio does not mean the singer/band is a faithful follower of Jesus Christ. Just because it's a rock song, does not mean the singer/band is NOT a faithful follower of Christ.
My son shared with me the other day that while he was driving he listened to a powerful sermon by Alistair Begg. Afterward, he tuned in to a rock station and heard The Who's, "Bargain" and cried his eyes out as he discerned the Lord singing it to his spirit. His heart was so touched by the Lord's love for him through that so-called "secular" song.
I can relate as Bryan Adam's song, "Everything I Do" makes me cry for joy and thankfulness because I hear Jesus singing it to me every time I listen to it.
Truly, it's what's in our heart that matters. There are some tunes on the radio I really like but if I hear filthy and/or hateful words that are a direct assault against Christ Jesus, I just turn it off. And there are some so-called "praise" songs that grate against my soul as the music sounds ridiculously trite and the words just without soul and I turn it off. Let's face it, there are a lot of "Christian" singers out there producing song after lifeless song just to make a buck.
Bottom line, if the song resonates life to me in its music and words, I listen to it.