Avril Lavigne - Complicated (OFFICIAL VIDEO ) 963HZ

Loneliness
The major purpose of music is to connect you to other people. It might be a way to connect to the performer or composer, the other people listening or dancing with you, or with memories or imagination of people that the music evokes.

Sadness
Happy music can make you feel happier directly -- not just by masking your sadness, but by actually changing your mood. This doesn't work on everyone, however; some people find happy music annoying when their sad. But there's a certain kind of sad music that has an uplifting quality to it. Blues and related forms are especially good for this. The music is full of pain, but it's also about enduring and overcoming pain.

Depression
Listening to music is an active imaginative process that engages a lot of brain regions simultaneously. You can use music to teach yourself to break cycles of obsessive sadness and anxiety.

Anger
Sometimes when you're angry, listening to calm music will calm you directly, the same way happy music can make you less sad. But as with happy music, sometimes calm music just makes angry people angrier. For these people, angry music might be more helpful. Listening to something angry validates your feelings and lets you release them through catharsis.

Boredom
This is an easy one. Music is interesting. If you're engaged with something interesting, it's hard to stay bored.