After singing a handful of songs in a Wednesday concert of multiple artists in Gothenburg, Sweden, Minnelli, 61, collapsed as she tried to exit the stage, an organizer said. She performed about half of her set. The concert included other performers.
Minnelli had complained of dizziness prior to the start of the show, according to a statement on her official website.
"As a result, she was unable to finish her performance and was rushed back to her hotel by her manager," the statement read. "A doctor, upon examining her and in consultation with her NY physician, determined that it would be necessary for the Oscar winning actress and singer to immediately return to New York City to receive further medical evaluation."
The Gothenburg show was the last of four performances scheduled in Sweden.
Minnelli won the 1973 Academy Award for Best Actress for "Cabaret." She won an Emmy the same year for her TV variety show, "Liza with a 'Z.'" Her Broadway appearances include Liza, The Rink, Victor/Victoria, The Act, Chicago, Minnelli on Minnelli and Flora, the Red Menace.
She has three Tony Awards on her mantle: Best Actress in a Musical statues for Flora, the Red Menace and The Act, and a special 1974 Tony for "for adding lustre to the Broadway season." She was also Tony-nominated for her work in The Rink.
Minnelli is the daughter of Judy Garland and film director Vincente Minnelli.