The conference is for all graduate students at my university. It's a one-day thing, where students from all disciplines share their research in either a talk or a poster. They always have a keynote speaker at the end of the conference, just before dinner.
A couple months ago, I received an email from one of the organizers, saying that he'd like to nominate me to give my talk about the Impostor Syndrome (I put together a workshop on this last summer, and gave it to the physics department in the Fall). Apparently, someone at the Teaching Support Centre (where I took the course which I created the workshop in), recommended me.
I told the guy I was interested, but didn't think anything much about it. Then, today, I get an email from the committee saying they have chosen my talk to be the keynote address!!
It's definitely a great opportunity though, and I'm sure it will open a lot of doors for me around the university. YAY!!!