How to put my apps and music from my itouch 4 to my iphone 4s?

I have an itouch 4 and all my paid music from itunes and apps (some cost money and the rest were free) are on it and I want to put all of it onto my iphone. What do I do? Can I still use the same apple account I use on itunes or can you not use both devices in one account? If I sync my itouch 4 on my computer and then unplug it and plug it into my iphone and sync it, will everything on my itunes account on my computer sync onto my iphone?

Don't worry, this will be so easy!

For your apps:
Go to the AppStore, tap on Updates at the bottom right corner, then at the top there's a banner that says "Purchased"
When you're there, go to Not on this IPhone or go to All and then you can browse through the apps that you have, and don't haven and there will be a little cloud icon with a an arrow and then you can get your apps back. It's very simple. I hope this isn't confusing

With your music, you do the same thing,
Go to iTunes app, go to more at bottom right corner, and tap purchased, and same process.

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