I think she has a really great, melodic voice and could do a great job with the song :)

Ooh, a like all of these singers ^_^

Kelly has an amazing voice, even if her songs aren't always. Katy's voice is too low and raspy for the song. Demi's voice is too "in your face" loud IMO- this just wouldn't be her style. Even though Selena can sing, but they tend to edit her, so IDK. And I just can't see Ashley doing it for some reason. She just doesn't click with the song for me.

She has the best voice out of these

She's the only one (besides maybe Demi) that doesn't have a voice made entirely of autotune. :P

where's the "none" option?

Katy Perry:awful at singing part of your world she’s too rocky

Demi Lovato: Blah

Selena Gomez: too horse

Kelly Clarkson: Mightn’t be bad

or Kelly Clarkson. I don't like Katy Perry's,Selena Gomez's and Demi Lovato's voice.

Brrr she's the only one whose voice I really like. Ashley Tisdale and Katy Perry have good voices, but I don't like their emotions they sing with, I don't know how to explain it. I just don't see the depth of their singing.. Well they're pop singers, but it is the Part of your world, so it has to be deep.

I only like her and Katy Perry out of these, and I couldn't see Katy singing Part of Your World.

She'd be okay actually.

Kelly and Selena, I couldn't bring myself to imagine that Katy's intepretation of the song. Despite that she's also my favourite!