How come Liza Minnelli doesnt sing her mothers songs.?

Liza minnelli is for those of you who don't know an actress and singer , her mother was the legendary Judy garland a true talent and legend an icon a gay icon, she of course starred in many MGM films of it's hey day obviously The wizard of oz and a star is born and Meet me in st.Louis. Liza has had Many... show more Liza minnelli is for those of you who don't know an actress and singer , her mother was the legendary Judy garland a true talent and legend an icon a gay icon, she of course starred in many MGM films of it's hey day obviously The wizard of oz and a star is born and Meet me in st.Louis. Liza has had Many famous friends Liz Taylor , micahel Jackson, Freddie mercury , she paid tribute to Freddie mercury after his passing , sung for Michael Jackson a tribute to him. But she has yet to do a tribute to her mother or sing over the rainbow or any of her mons songs like the man that got away and the trolley song , maybe she does bot sing then because it's too emotional for her , she did sing in a tribute to her song the closing notes of over the rainbow bit never fully.
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