Denny Randell (also a hit for The Spinners in 1979, and in Ireland for Boyzone in 1994), "Opus 17 (Don't You Worry 'Bout Me)", and, with Bob Crewe, "Let's Hang On!". Randell and Crewe later co-wrote Valli's solo hit "Swearin' To God". In 1965, Randell and Linzer wrote and produced most of the songs for the R&B girl group, The Toys, including their singles "A Lover's Concerto" (adapted from "Minuet in G major", a classical music piece), and "Attack!" Another Toys recording written by the duo, "Can't Get Enough Of You Baby", was later covered by the garage band ? and the
Notebook for Anna Magdalena Bach and two other pieces with a doubtful attribution to J. S. Bach: Opening bars of "Solo per il cembalo", BWV Anh. 129, by Carl Philipp Emanuel Bach, piece No. 27 from the 1725 Notebook: Anh. III 129 – No. 27: "Solo per il cembalo" in E-flat major by C. P. E. Bach (early version of the keyboard sonata Wq 65.7 / H 16). Anh. III 130 – No. 28: Polonaise in G major by Johann Adolph Hasse, i.e. "Polonoise secondo", originally in F major, from his keyboard sonata in F major. Untitled movement in F major, , piece No. 32