Charo, born María del Rosario Pilar Martínez Molina Baeza, appeared with Rasten and their son, Shel, on an episode of Celebrity Wife Swap in 2015, with Charo’s former Love Boat co-star Jill Whelan.
Charo’s husband of more than 40 years has died after taking his own life, according to US media reports.
Kjell Rasten, a TV producer who married the singer and actor in 1978, is said to have suffered a self-inflicted gunshot wound at the couple’s home in Beverly Hills on Sunday 17 February.
The Independent has reached out to Charo’s representative.