Not a single one of the Mamas and Papas was a boomer, they were all from John McCains and Jane Fonda’s, William Ayers and Bernardine Dohrn’s generation.
They were not boomers like Sarah Palin and Tom Cruise.
They were all Boomers in spirit. As to Sarah, I don’t think she qualifies. Are you sure she was born between 1946 and 1964? If so, it was right on the cusp.