By Leah Ornstein - Breaking Celebrity News Style & Beauty Editor

Jennifer Hudson is disappearing!

The Dreamgirls star fulfilled her role as ambassador for Michael Kors over the weekend celebrating the designer’s Omotesando store opening and Tokyo’s Fashion’s Night Out, showing off her dwindling-away waistline in two of the designer’s dramatically glam dresses – and Breaking Celebrity News has the photos and details.

For Tokyo’s FNO event, the singer and actress rocked a leopard print dress from Kors’ Spring 2012 collection, which she paired with Salvatorre Ferragamo heels. The animal print number was previously worn by supermodel turned Transformers star Rosie Huntington-Whiteley.