In 1975, record sales exploded for both Valli and the Four Seasons as both acts had million-selling singles in the United States ("My Eyes Adored You" hit #1 on the Hot 100 for Valli in March, "Who Loves You" (with Valli on lead) peaked at #3 in November for the band and #6 in the UK chart). In the United Kingdom, Tamla Motown released "The Night" as a single on the 'Mowest' label and saw it reach the #7 position on the UK Singles Chart. "My Eyes Adored You" was also a top 10 hit in the United Kingdom in February of that year. Valli had his first truly solo hit in the summer of 1975 when the Bob Crewe-produced "Swearin' to God" followed "My Eyes Adored You" into the upper reaches of the Hot 100, peaking at the #6 position and capitalizing on the growing disco craze. The song was released in three forms: the eight-minute album version, the ten-minute extended 12-inch single version, and the four-minute single version. This record featured Patti Austin on bridge vocals before she became well-known. Valli followed this with a discofied #11 hit version of Ruby & the Romantics' "Our Day Will Come", also featuring Austin.
In 1975, record sales ,exploded for both Valli and the Four Seasons as both acts had million-selling singles in the United States ("My Eyes Adored You" hit #1 on the Hot 100 for Valli in March, "Who Loves You" (with Valli on lead) peaked at #3 in November for the band and #6 in the UK chart). In the United Kingdom Tamla Motown released "The Night" as a single on the 'Mowest' label and saw it reach the #7 position on the UK Singles Chart. "My Eyes Adored You" was also a top 10 hit in the United Kingdom in February of that year. Valli had his first truly solo hit in the summer of 1975 when the Bob Crewe-produced "Swearin' to God" followed "My Eyes Adored You" into the upper reaches of the Hot 100, peaking at the #6 position and capitalizing on the growing disco craze. The song was released in three forms: the eight-minute album version, the ten-minute extended 12-inch single version, and the four-minute single version. This record featured Patti Austin on bridge vocals before she became well-known. Valli followed this with a discofied #11 hit version of Ruby & the Romantics' "Our Day Will Come", also featuring Austin.