A song I can think of is Bullet by Hollywood Undead. The melody isn't exactly supporting the lyrics, but when you first hear the song you think it's a happy song about life or something. But when you listen to the lyrics you think, "Hey, I had no idea that this song is about the vocalist wanting to end his life. Wow, I'm typing this and realizing that the melody is happy and covers up that it's a sad song. Like how in the song he's singing about being sad but no one realizing it. That happened.
