Katy Perry - Fire Work
This song shows a metaphor in the way katy perry explains how every one can be special, bright and beautiful. Show your talents to the world. She says you have to be yourself and not someone else, she says you have to be the best "firework" you can be, let yourself shine bright.
Titanium - David Getta and Sia
This song's metephor explains that anyone can be as strong as Titanium . She says people will be knocked down but you have to get up again and be strong. The song repeats many times you have to be your self, that when you get knocked down be strong and don't fall.
Waterfall - TLC
This song explains that you don't go after things that are not worth it. Stick to the things you can pursue for long periods of time. The song shows somone who lost himself and
Can't Stop the feeling includes many metaphors on including the phrase - "I got that sunshine in my pocket Got that good soul in my feet. "
The sunshine in the pocket is an implied reference to the happiness felt when the singer starts to dance. There is also the play on words with "soul" that might be referencing a kind of dance music and its homonym "sole" for the bottom of a foot
"Baby, this is what you came for, Lightning strikes every time she moves, And everybody's watching her"
The Lightning in this phrase may be representing power. Lighting is referenced to this frequently in poems.