Liza Minnelli looked totally unbothered rolling out of an event plugging her new memoir ... in which she spills plenty of Hollywood tea. The legend was wheeled out of her "Live In Conversation'' stop at the Million Dollar Theater in L.A. Tuesday night, where she promoted "Kids, Wait Till You Hear This!" She was all smiles, waving at fans as she headed to her car -- and honestly, she looked like a weight had been lifted after unloading in the book. And she has a lot to say about her past movie