Octomom -- I'm Going to the AVN Awards!

Octomom is so excited her solo porn tape got nominated for four AVN Awards, she plans on going to the ceremony in Las Vegas ... and she expects to go home a winner.

Octo tells TMZ she was "completely surprised" that she was nominated for Best Celebrity Sex Tape, Best Solo Release, Best DVD Extras, and Best Marketing Campaign for her film "Octomom Home Alone."

The mother of many says she feels she has a good chance to take the Celebrity award, telling us, "I don't consider myself a celebrity, but I have never heard of the other people nominated. So I'm pretty sure I have a good chance of winning."

Octo says she views the show as a once-in-a-lifetime opportunity ... since she doesn't plan to make another video ... ever.

Something we all can be thankful for.