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 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.