How can I play tracks while phone is locked without queuing?

[NathanG2]

i am trying to make a ‘skin’ atop Spotify, where users can play a song through my app, and itll play through Spotify.

Due to how Spotify handles activity, I can’t keep my phone locked to play tracks in the background, and the queuing system doesn’t work well (both using Web API as well as IOS SDK) because I cannot replace/clear a queue, and they just stack. Any ideas?