Guess what! On August 26, 2015, a new mini album will be released. It will go by the name of "PriPara Idol Songs♪ Collection by Aroma & Mikan & Lala & Mirei & Sophy" (プリパラ アイドルソング♪コレクション by あろま＆みかん＆らぁら＆みれぃ＆そふぃ).
I found this out on here: http://vgmdb.net/album/53298
You can find the track list if you click on the link.
If this has already if been spoken about here, then I apologize.