Tagging is a bitch.
It's very frustrating when you want to listen to, say, Disclosure, and then you go to Artists and tap on their icon, only to find out that the song you want to listen is not there because it is under 'Disclosure feat. AlunaGeorge' tag.
Can we please agree to add collaborations to the song title? I have around 12 different entries for some artists because people keep putting collaborations on the Artist field, so your phone or whatever device you are using thinks it is a completely different artist and creates a separate folder for it, making it very unintuitive to navigate your catalogue if you are filtering by Artists (this way the tag would be 'Disclosure - White Noise feat. AlunaGeorge').