Frankie Valli, 89, Ties the Knot for the Fourth Time in Vegas Ceremony

Franke Valli can't take his eyes off his wife!

The Four Seasons founder (born Francesco Stephen Castelluccio) and his love Jackie Jacobs officially married in a very private ceremony on Monday, June 26, at the Westgate Hotel in Las Vegas.

After the couple said "I do," the 89-year-old singer gushed about his relationship and the beginning of his fourth marriage. "It's terrific to have found love once again at this stage of my life," he told People.

During the conversation, Valli also confirmed that the wedding ceremony only included two attendees–the bride and groom–and included an intimate solo performance of the Rock & Roll Hall of Famer's 1967 certified gold record, "Can't Take My Eyes Off Of You."

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In photos obtained by the outlet, the 60-year-old bride looked ethereal, wearing a simple white bridal gown and tiered silver earrings. Styling her hair in a sophisticated updo, she completed the look with a glam smokey eye and nude lip color.

Their romance has been a long time coming, as the two initially met 16 years ago but spent eight of them as friends before the musician and former CBS marketing executive began dating in 2015.

"We met at a restaurant in Los Angeles where he joined my friends and I for dinner," Jacobs recalled. "We kept in touch by phone until he called me and asked for a date in late 2015 and we've been together ever since."

This marks the fourth exchange of nuptials for the Newark, New Jersey-born singer. He fathered two daughters, Antonia and the now-late Francine, with his first wife, Mary Mandel, as well as helped raise Mandel's daughter from a previous relationship, Celia, who also tragically passed away. The couple was married for 13 years before divorcing in 1971.

Valli married MaryAnn Hannigan three years later, but the two ultimately split in 1982. Then in 1984, the "Sherry" crooner wed Randy Clohessy, with whom he welcomed three sons–Francesco and twins Emilio and Brando–over the course of their 20-year marriage before later announcing the two had split up in 2004.

Next: Joan Collins, 90, Celebrates Rarely-Seen Daughter's Birthday in Photo Update