Is there a way to change defaults in ios7?

[Zellio]

I would really like it if Siri could open music in Amazon Cloud Player for me..

 

[xConnerIdan]

I would really like it if Siri could open music in Amazon Cloud Player for me..

Not sure, since Apple and Amazon has to cooperate together on coding Siri to open the app...

 

[dictoresno]

i just tested this. she opens the amazon prime video app and the amazon app both perfectly fine. and also opens pandora (tested since you said music app) also without an issue.