so here's an attempt of a thread: tracking down the music references in aikatsu planet's episode titles (starting with next week's)

episode 12: High School Lullaby

titled after an Imo Kin Trio song, composed by Haruomi Hosono and w lyrics by Takashi Matsumoto

episode 13: Yureru Omoi

one of ZARD's biggest hits, released in 1993.

episode 14: Kore Ga Watashi No Hashiru Michi

a PUFFY song! Kore ga Watashi no Ikiru Michi is apparently a tribute to early Beatles music

episode 15: Jounetsu no Bara

the only single from The Blue Hearts that has reached No. 1 on the Oricon singles chart.

ep 16: Pajama Party Night

similar to ep 5's title (Cinderella Girl) this could potentially be a reference to many songs but Ryuichi Kimura, director of Planet and the original Aikatsu series, is a Negicco fan so...

ep 16: Dress wa Question

Fans seem to agree this is a nod to Onyanko Club's Koi wa Question. This song was used as the opening theme for the anime Anmitsu Hime.

ep 17: Oshare!

Finally, a Hello! Project song gets to appear on this thread. From Ayaya's great first album.