This is what we found on Wikipedia regarding the Oh What a Night:

"December, 1963 (Oh, What a Night)" is a song originally performed by American band the Four Seasons, written by original Four Seasons keyboardist Bob Gaudio and his future wife Judy Parker, produced by Gaudio, and included on the group's album Who Loves You (1975). The song features drummer Gerry Polci on lead vocals, with Frankie Valli, the group's usual lead vocalist, singing the bridge sections and backing vocals and bassist Don Ciccone singing the falsetto part. The song reached number one in Canada, South Africa, the UK and the US. In 1996, British act Clock had a European hit with their cover version.