Kate Hudson shines in a show-stopping number in her new movie 'Nine,' in theaters Christmas Day, and the Oscar-nominated star dishes on working with such co-stars as Nicole Kidman and Daniel Day Lewis -- and life with Yankee slugger Alex Rodriguez!

"It was a great year -- even better fall," Kate tells our own Mary Hart, referring to the Yankees' World Series win. Asked if she's in a good place, Kate grins and replies, "Yeah. Very happy. Really fun."

In 'Nine,' Kate channels her go-go-boot-wearing mom Goldie Hawn's "Laugh-In" days in a rollicking musical number, showing her versatile side by dancing and really belting it out.

"[A big song-and-dance number has] always been something I wanted to do," says Kate. "My mother was a big believer in if you want to do this in your life, you have to go for it. … For her to watch her daughter [singing and dancing], the essence is we're performers and that's in our blood, and she gave a lot of that to me."

Co-star Daniel calls Kate, "Unbelievable; I watched her rehearsing -- she was just wonderful." And director Rob Marshall says, "I was so surprised, and that's why we basically created a role for her. And we wrote this song ["Cinema Italiano"] for Kate -- she was so thrilled to do something she had trained for."

Kate's a lot more modest about her performance, however. Thinking about what nearly six-year-old son Ryder will say about the film, "I think he's gonna be more into [his dad Chris Robinson's] rock-and-roll thing. I think he's gonna be like, 'Oh, mom and her sparkles.'"

Kate adds that she got to know Nicole and Penelope Cruz very well during the shoot because they all lived in the same London apartment complex.

"It was fascinating to be able to dance and sing and learn and play with all of these women and really get to know them," says Nicole. "That just doesn't happen often and I think we're really tight because of it."

Watch ET for more with the stars of 'Nine'!

'Happy' Kate Hudson Answers Questions about A-Rod Romance Nov 18, 2009 09:28 AM

Bardem Says No to 'Nine' Due To Exhaustion May 01, 2008 08:43 AM