The seventies band Abba (said to be among the top 5 big sellers in history) enunciate their songs very clearly. And even though they are Swedish, their lyrics are as well written and pronounced as any native singer. Here's the first part of their song "Move On". "Move On" They say a restless body can hide a peaceful soul. A voyager and a settler, they both have a distant goal. If I explore the heavens, or if I search inside, Well, it really doesn't matter as long as I can tell myself I've always tried. Like a roller in the ocean, life is motion. Move on. Like a wind that's always blowing, life is flowing. Move on Like the sunrise in the morning, life is dawning. Move on. How I treasure every minute, Being part of it, being in it, With the urge to move on. ...

You could listen to Taylor Swift, her music is easy to understand.

I usually listen MAGIC and SOJA. It's very easy to understand them.

The British group Elbow produce some beautifully poetic lyrics. Try "One Day Like This".

The band Our Last Night is also really good for learning vocabulary and listening!