Liza Minnelli Checks In to Rehab

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Liza Minnelli attends a press conference ahead of her tour 'Liza's at the Palace' at the Sydney Opera House on October 13, 2009 in Sydney, Australia. 

Liza Minnelli is undergoing treatment for substance abuse at a Malibu rehab center. 

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A rep for the singer told Billboard, "Liza Minnelli has valiantly battled substance abuse over the years and whenever she has needed to seek treatment she has done so. She is currently making excellent progress at an undisclosed facility."

Her mother, Judy Garland, died in 1969 from an overdose of barbiturates. 

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Minnelli's latest release was this past winter, teaming up with jazz legend Wynton Marsalis for a new song called "Until the End" that was featured in the documentary film Garnet's Gold. Listen to that here: