Each picture represents a popular song. Some are easy, some aren't. Some are literal, some abstract. Some will win, some will lose, some are born to sing the blues.
I don't even know what the last one is. The artist would only say it's a Beatles song (like several others here), and I don't know them well enough to guess. But I bet some of you do.
Another cool Photoshop contest from Worth1000.com.