"Monster" (モンスター, Monsutā) is Pink Lady's eighth single release, and their seventh number-one hit on the Oricon charts in Japan.

It also peaked at number-one on the Japanese Music Labo chart.

[3] "Catch Lip", the B-side song, was used for commercials promoting Snow Brand's Hōseki-bako ice cream.

[4] The song was performed on Pink Lady and Jeff along with "UFO," making those two the only Pink Lady songs to be performed on the show.

All lyrics are written by Yū Aku; all music is composed and arranged by Shunichi Tokura.