Well, I couldn't remember the songs either, so I just googled 大塚愛 盗作, and got the SMILY *original* composer, it's
wyse, and the song is called "Friend". I also found that "Planetarium" is *supposedly* ripped off from RIKKI's song 素敵だね (Suteki da ne; 2001; FFX theme song), as said that not only part of words & melody is the same, but also the PVs are similar:
I've never heard the song, but it should be findable being FF theme... LOVE bunny is also mentioned, with the avex "numaneko" scandal.