that nerdy chick with glasses who sings some love song on a night show

[huber117]

someone posted a link to her a while ago, it was a guest performance on a late night show. i remembered it but i cant find her anywhere i dont remember her name or the song shes famous for. she looks like tina fey and has a hot nerd look going for her. ive searched youtube, went through a bunch of artist pages on aol and yahoo but cant find her, hoping someone out there can help me out.