When Hudson was filming "Dreamgirls," the song she listened to the most was "Impossible Dream" by Luther Vandross.
The song reminded Hudson that she was living her own dream, however impossible it seemed when she was young.
"A lot of people think this is all intangible, and here I was living it," she said. "In Hollywood, nobody gets a second chance -- and I got a second chance, and what second chance is better than the one I was allowed."
'Circle of Life'
Hudson covered Elton John's "Circle of Life" on "American Idol" and earned his high praise. Many have called her performance of the song on the show her defining moment on "Idol."
"That was the first time on the show that I got a chance to really show a piece of me, and it was well accepted. And that was refreshing for me to see, like, 'Wow, they embraced me.' Like the other songs, it wasn't so much me, but then when I had the chance to present who I was even a little bit, it was in that song, was received so well," Hudson said.
'I Kissed A Girl'
One song that her supporters might not realize Hudson enjoys is Katy Perry's "I Kissed a Girl."
"It's hip and I think she's got a great voice as well. It's just catchy and it's fun," she said.
The different subject and approach of the song is a refreshing change, Hudson said.
"I love the subject and that lyrically it's just something new to talk about," she said. "Every song can't be about a relationship, and she took it, and it's something that's current."
But don't expect to hear Hudson covering the song anytime soon.
"For me," she said, "I guess it'd be something far left for me to do."