Okay, I think I might be onto something, but I haven't dug up answers to all the clues. I think @LogicianWithAHat was on the right track with different clues representing different roles. Here's what I have so far:
The clues (most are "[role] in [movie]"):
I'm an executive producer.
I forgot which role I had here
I love gold shoes.
Sydney Prosser in American Hustle
I was born in Kansas.
Lois Lane in Man of Steel
I'm well traveled.
Amelia Earhart in Night at the Museum: Battle of the Smithsonian
I'm a designer. (not clothing)
Amy in Her (she's a video game designer)
I have "Happy Feet".
Perhaps Giselle in Enchanted? She does a lot of dancing.
I'm a natural blonde.
I've been on TV.
She's been on multiple TV shows, including The Office and, interestingly, Smallville
My middle name is Joyce.
Not sure, trying to find a character she played with this last name.
I was born in the early 40's.
Janis Joplin in an upcoming biopic (Janis Joplin was born in 1943)
It's a Female
She has a show geared towards a specific genre.
She has videos on You Tube.
She does, but so do many celebrities.
So many of the roles fit that I think I'm probably right, but I'm having trouble filling in all the holes. I thought I'd figured out the executive producer clue, but I can't remember which role it was. Additional thoughts are welcome!
Here's her imdb if you want to go a-searching.