Dodie Clark (Doddloddle) is saying that this girl reminds of everything that inspires happy memories within her however the girl thinks of nothing special when she sees her.

Sia means that she has relapsed again even though she promised she would never do it again. I feel that this song is directed at self-harm, cutting in particular. Once you make that first cut in your skin, it becomes an addiction that gets worse and worse. She is saying that she was self-harming but she managed to stop, however she has just done it again. She has started and stopped cutting many times before.

Your soul is everything about you: your feelings, emotions, experiences and your memories. A window pane is the sheet of glass in a window: it is usually quite thin and it is obviously transparent. In saying that Lil Wayne can "See your soul through your window pane" he means that when he looks at his reflection in the mirror, he can see everything about himself.

When Lil Wayne looks in the mirror he sees his own reflection. These few lines mean that the person you see when you look at him doesn't reflect how he feels on the inside. He hides how he feels to other people but when he looks at himself he can pick out his weak points: "I see the blood in your eyes" means that when he sees his own eyes in the mirror, he sees the hatred he feels towards some things. "I see the love in disguise" means that he hides the love he feels but when he looks at himself he can pick it up even if others can't. "I see the pain hidden in your pride" means that he acts like he is proud but when he looks at himself in the mirror he can identify how he has made his way to being proud and knows that he has had to do some things that he didn't like to do.

This line means that when someone looks at Lil Wayne they literally just see him, however when he looks at this person he can see many layers of hurt, anger and other emotions.
He doesn't just see what stands before him, he has a deeper understanding of the person.

Rihanna means that when there is nothing else, there won't any fancy distractions to come between them. When all else is lost there won't be any excuses.

When you look at a mirror you see your reflection, yourself. Bruno Mars is saying that he has been so badly hurt in the past he knows that the only person he can trust is himself. Throughout his good times and his bad times, he has only confided in himself because he only trusts himself and no-one else.

"Play our little game" is like telling somebody else to join in with their act and pretend to be someone they're not to fit in with society. The "little game" is a metaphor for the act of changing your personality or the way you appear to show a more masculine or feminine side.

Ally means that she is always thinking about the girl that she has a crush on. She tries time and time again to forget about the girl but she just can't because she loves her too much.

Sam Smith means that he finds it hard to be happy because he was so used to feeling happy with his boyfriend that he doesn't know how to react now that his boyfriend is gone.
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Sam Smith means he doesn't sing just for the fame and money. He enjoys being famous but money is not what he thinks about. He wants to be a singer because he enjoys singing and loves his fans, not because he loves the money.

Sam Smith means when he got signed to a record deal he didn't necessarily want to do it for the money he received but now that he is working and living as a singer/ songwriter he does get more and more money which wasn't his intention. Each time he produces a new song he gets more money which makes him feel pressured into continuing his work solely for money rather than doing it for fun because he enjoys it. He just wants to be happy in his profession rather than be known as a famous man that has lots of money: in other words, he enjoys the fame but not so much the power that comes with it.

It means that he knows he doesn't really have anything of any value that he would be able to give to anyone but he acknowledges the fact that there are many more important things in life than money.

Ally is willing to change every part of herself so that she is perfect in the eyes of her lover.

Ally means that she loves this girl more than words can say but she feels that the girl is too good for her and that she won't ever notice her, never mind want to date her. Ally tries everything that might have any chance of getting the girl to love her back but each and every time the girl dismisses her, making Ally feel even worse about herself. She believes that the girl is superior to her however if Ally had the chance to date this girl that she loves, she would seize it with both hands.

This is an extremely clever and thoughtful metaphor. The rain represents Adele's partner because he was constantly making her feel upset and depressed with all his cheating. By "setting fire to the rain" Adele ended the depressing relationship she had with him for her own good. Setting fire to the rain also means that she good rid of him well and truly: he wouldn't dare return however much he wishes to.