User blog comment:TedPatrick1005/Just a theory/@comment-26365532-20170509130049

Well I'd just like to say, Hibiki DOES appear in PriPara Lalan, but not actually singing just a character in the background kinda like the mini-Faruru's in Precious.

I heard it did piss some Hibiki fans off though xD There was apparently even a spot for her between her two Tricolore waifus (xD)

Note: All this stuff is from lets-play-pripara's tumblr, I haven't seen the movie myself xD