It is the best thing in the world. Who needs a radio..I sing a capella all the time! I sing show tunes, xmas songs, church songs and then when I can't think of what I want to sing I sing to the radio.
I thought of the best story. I was singing with my kids, the itsy bitsy spider and I was sitting at a light. Well, I look over and this guy is starring at me mouth wide open...my back windows are tinted so I guess he couldn't see my DS2 and DD10mo in the back signing the song with me. So, I rolled down my window and started singing at the top of my lungs..then I told him to join me..he just looked at me..but I laughed so hard!