Yes Malu, it's been done. Go to this link:
http://www.folcvideo.com/videos.html and scroll down the page to Karen Ward's name. You will see the song "Holding Out For a Hero". Just click on the title to watch it.
Also a different version was done at this website:
http://www.loisandclarkarchive.com/Videos/videos2004.htm scroll down the page to the middle to find it. She credits Karen with having done it first, she just did a different version.
Happy viewing!