All my music has disappeared from my iPhone?

Ok so a couple weeks ago, I was at my dad's house (I don't live with him) and I downloaded music from their Mac (different iTunes account) onto my phone. I downloaded about 200 songs. Well today, I was listening to music and out of nowhere, it stopped playing and all the music except for the music I had downloaded directly from iTunes I my phone, had disappeared. So all the songs I downloaded from the Mac are gone. How do I get them back?!

Connect it to a Mac with iTunes on it or login to iTunes and simply download it again. Maybe, your dad's Mac and your iPhone are synced, but that's never happened to me before. I have an iPhone and an iPad and they use the same iCloud account, and they always sync and download the same apps, and I don't know if deleted songs/apps are synced too - but that's just a hunch. Just download them again.
There are forums to help you with situations like this, try MacRumors or the Apple support community. There are many experts there.

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