Glitchy??

[user-removed]

So I love Spotify, but everyone and then, a song won't play on my iPhone, but it will on my PC. Some songs will play for a while until something glitches (right now that's better by one republic for me which is my fav song) and then there are some that play on my PC but immediately when I play them on Spotify, it just won't play. There are several of my fav songs that just won't play and I'm so frustrated and confused. Plz help