Jennifer Hudson said on Wednesday she can't wait to perform again, now that she has a slim new look.

Hudson, 29, has dropped five dress sizes since joining a Weight Watchers program last year -- and having her first baby.

"I can't wait to perform again -- with my new body," Hudson told Reuters at a New York school.

Hudson, a former "American Idol" contestant, won a best supporting actress Oscar for her role in the 2006 musical "Dreamgirls". Her 2008 debut album "Jennifer Hudson" yielded a Grammy and has sold more than one million copies.