Manic Monday by The Bangles was released on January 27, 1986, with In a Different Light as the B side. The song, written by Prince under the pseudonym Christopher, was the first single from the band’s second album Different Light.

The picture sleeve for the 7″ release of the song

The song was The Bangles’ first hit, reaching No. 2 on both the Billboard Hot 100 and the UK Singles Chart.

According to songfacts.com, Prince discovered The Bangles after seeing the video for their single Hero Takes a Fall on MTV. He put together a mixtape for the group with two original songs he had written and wanted them to record, including Manic Monday.