1) Easily one of the greatest heavy metal song ever written, originally by Diamond Head then covered by many, which most notably of which is the mighty Mettalica.
2) If you're thinking this question to yourself... then you most likely are.
Person A: "Oh my god i just heard 'Am I Evil?', it's awesome"
Person B: "I know right but after listening to it I always think 'because I like a song like this, am I evil?"
A pointless phrase that is most often used on the internet.
It is used to whore for attention, because if someone is asking whether or not he or she is the only one, he or she should already know that the answer is "no," yet proceeds to ask anyway. Thus, "am I the only one" disguises a statement of opinion as a question.
It is also used to convince oneself that one's opinion is a unique, nonconformist take on things and everyone else are sheep (or worse yet, sheeple).
Idiot: Am I the only one who doesn't care about Iron Man 2?
Dude: No, idiot. Everyone else who doesn't care about Iron Man 2 doesn't waste their time looking for discussions on Iron Man 2.