Editing The Four Seasons (band) (section)

===1965–1968: Departure of Nick Massi; One band, several acts===
[[File:Charles Calello Conducting.jpg|thumb|right|[[Charles Calello]] (seen here in 2018), in addition to briefly being a band member in 1965, did extensive arrangement for Valli and the Seasons throughout the 1960s and 1970s.]]
Nick Massi left the Four Seasons in September 1965. The band's arranger, [[Charles Calello]] (a former member of the Four Lovers), stepped in as a temporary replacement. A few months later, [[Joe Long]] was permanently hired and became a mainstay of the band on bass and backing vocals until 1975, with Calello returning to arranging. Massi's departure coincided with the addition of new songwriters such as [[Sandy Linzer]] and [[Denny Randell]], who eased the burden on Gaudio, while Randell absorbed some of Massi's arranging duties.<ref>McIntosh, Danny (November 7, 2011). [https://www.songfacts.com/blog/interviews/denny-randell Songfacts Interview with Denny Randell], Retrieved September 27, 2023.</ref>  In the meantime, the Four Seasons released recordings under a variety of names, including the Valli Boys, [[the Wonder Who?]], and [[Frankie Valli]]. Every Valli "solo" recording from 1965 to "[[My Eyes Adored You]]" in 1974 was recorded by the Four Seasons at the same time and in the same sessions as other Four Seasons material; these were usually distinguished in that material written and marketed as Valli solo numbers did not have Valli's trademark falsetto.<ref>{{Cite web |url=https://frankievallifourseasons.com/bio/ |title =Bio – Frankie Valli and the Four Seasons|date =September 14, 2019}}</ref> Valli's first post-1960 single without the Seasons was 1975's "[[Swearin' to God]]".

More top 20 singles followed in 1965, 1966, and 1967, including "[[Let's Hang On!]]", "[[Don't Think Twice, It's All Right]]" (as the Wonder Who?), "[[Working My Way Back to You]]", "[[Opus 17 (Don't You Worry 'bout Me)]]", "[[I've Got You Under My Skin]]", "[[Can't Take My Eyes Off You]]" (released under Valli's name as a "solo" single), "[[Beggin']]" (later covered by Norwegian duo [[Madcon]] and Italian band [[Måneskin]]), "[[Tell It to the Rain]]", "[[C'mon Marianne]]", and "I Make a Fool of Myself" (Frankie Valli "solo"). Also, other Crewe/Gaudio songs that did not become hits for either Valli or the Four Seasons became international hits in cover versions, such as "[[Silence Is Golden (song)|Silence Is Golden]]" ([[the Tremeloes]]) and "[[The Sun Ain't Gonna Shine (Anymore)]]" ([[the Walker Brothers]]). However, 1968's "[[Will You Love Me Tomorrow]]" was the band's last top 40 hit for seven years (reaching #24), just after Valli's last "solo" hit of the 1960s, the #29 charted "To Give (The Reason I Live)".