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07/05/1966 The Mamas & The Papas are #1 on the US singles chart with "Monday Monday"

"Monday, Monday" is a song written by John Phillips and recorded by the Mamas & the Papas using background instruments played by members of The Wrecking Crew for their album If You Can Believe Your Eyes and Ears. It was the group's only #1 hit on the U.S. Billboard Hot 100.