Twelve Thirty (Young Girls Are Coming to the Canyon) Twelve Thirty (Young Girls Are Coming to the Canyon) "Twelve Thirty" a.k.a. "Twelve-Thirty (Young Girls Are Coming to the Canyon)", the song's main refrain, is a song by The Mamas & the Papas. After the release of the group's third album -- "Deliver"—and their appearance as the closing act of the Monterey International Pop Festival, the group was scheduled to appear in England. The visit was catastrophic for both the group and Cass Elliot (see The Mamas & the Papas main article for further details), and resulted in Cass leaving the group temporarily. The group had completed four tracks for
The Mamas & the Papas February 1966 and became its only number-one on the "Billboard" 200. The third and final single from the album, "Monday, Monday", was released in March 1966. It became the band's only number-one hit in the US, reached number three in the UK, and was the first number-one on Spain's new Los 40 Principales. "Monday, Monday" won the Grammy Award for Best Pop Performance by a Duo or Group with Vocals in 1967. It was also nominated for Best Performance by a Vocal Group, Best Contemporary Song, and Record of the Year. Their second album, "The Mamas & the Papas", is