Board Thread:Love Live! School Idol Festival Lounge/@comment-29023734-20160725023833

I have 2 pure SSR's and 9 pure SR's, and I was wondering if i should use two of the SR's that I never use for EXP and use the sticker I get from them to idolize some of my other SR's. I have never done this before, and I don't know if it will work or not... Opinions? 