Actress and singer Doris Day died of pneumonia on Monday at the age of 97.

Best known for her wistful song “Que Sera, Sera,” Day passed away surrounded by close friends at her home near Carmel Valley, California, the Doris Day Animal Foundation said in a statement.

“Day had been in excellent physical health for her age, until recently contracting a serious case of pneumonia, resulting in her death,” the foundation said.

Day was a top star in the 1950s and ’60s and among the most popular screen actresses in history. She made nearly three dozen films and more than 600 recordings. At the height of her career, she topped both the billboard and the box office charts.

“During her three decades of work in film, Day starred in nearly every genre, not just as a singer/dancer but as an actress with superb comic timing, a natural talent for interpreting a role and a gift for evoking emotion,” her foundation said.

Day was know as the “girl next door”, and the comedies she was best known for were daring and sexy for the time period. She teamed with Rock Hudson in “Pillow Talk” and other lighthearted romantic comedies including “Lover Come Back” and “Send Me No Flowers.” Other significant screen roles included Alfred Hitchcock thriller “The Man Who Knew Too Much” (1956), and Day’s Oscar-winning song “Que Sera Sera” (Whatever Will Be, Will Be).

After many successful films, she starred on CBS in “The Doris Day Show” for five years starting in 1968, and soon after retired to California. Her 1976 tell-all book, “Doris Day: Her Own Story,” chronicled her money troubles and three failed marriages, contrasting with the happy publicity of her Hollywood career.

The legendary entertainer “wishes were that she have no funeral or memorial service and no grave marker,” according to her foundation’s statement.