Cavanaugh died of kidney failure Dec. 19 at a nursing home in San Fernando Valley, said Phil Mallory, his bass player of 18 years.
The Page Cavanaugh Trio was one of Southern California's most popular nightclub acts from the 1940s to the 1990s, performing at Ciro's, the Trocadero, the Captain's Table, the Money Tree and the Balboa Bay Club.
The group played in the film "Romance on the High Seas" with Jack Carson and Doris Day. The trio showed up in movies such as "A Song Is Born," "Big City" and "Lullaby of Broadway."
Cavanaugh's trio also appeared with Frank Sinatra on his "Songs By Sinatra" radio show and played for NBC Radio's "The Jack Paar Show."
Their hits included "The Three Bears" and "She Had to Go and Lose It At the Astor."
Cavanaugh never married and had no surviving relatives.