QQ音乐（APP）or 酷狗（APP）里面有很多周杰伦的歌曲

let me correct your question first : 请问我在哪里可以听周杰伦的《明明就》？ I think you can search it in Youtube~ good luck !

Where can I find the instrumental for "明明就“ by ”周杰伦“?

sorry.maybe u can ask the question in ur Mother Language? the sentence above is really...hard to understand.

Sorry, 没看懂你的意思。