Sadly that's the main part I remember. It's alternate reality and Spike and Buffy are both actors nominated. I'm not sure if it was for a tv show or a movie though. This was a long time ago.

Hi! I don't know if this is what you're looking for, but in my extremely smutty fic 'Star Quality' Spike and Buffy are both porn actors. At one point they are nominated and go to the Adult Entertainment Awards.

Sadly, the fic is still a W.I.P., I just haven't had the time or opportunity to get back to it yet.

I believe you can find it here on TSR and on my own Panther Crawl site:
http://www.marymo.net/paganbaby/viewstory.php?sid=13

While Star Quality is a good fic... it's not the one I'm thinking of. Thanks for the input though.