What are good examples of Metalcore/Hardcore songs that are written in a major key?

I know there is some A Day To Remember type stuff, but I am looking for something that is a bit more complex. I am trying to write a "happy" song for my band and I need some inspiration.
Miley Cyrus- Party in the USA
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Oh wow this is a guitar forum!
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Karvid is sexy

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Why is it that some folks quote praise from other members in their sig lines?
Its lame.