Vintage Lady Gaga Live at NYU - Captivated & Electric Kiss:
http://youtu.be/NM51qOpwcIM
I think her pure musical talent is pretty obvious here. Not a fan of most of her music, but it's mostly the genre I don't like. The weirdness is no different than Madonna, Marilyn Manson or Alice Copper who also created onstage personas to shock people.
It's funny to me that this is called vintage circa 2006.