Minnelli, who has been recovering in Los Angeles following surgery to fuse a broken lower back, surprised friends and fans with a special performance of "I Love a Violin," originally written by her godmother, Kay Thompson.
"She's doing really well and looking forward to celebrating the holidays," a representative for Minnelli told Playbill.com.
Liza Minnelli won Tony Awards for her performances in Flora, The Red Menace; and The Act. She also received a 1974 Special Tony Award for "adding lustre to the Broadway season."
Below, Minnelli performs the song in Liza's at the Palace: