For all those who missed the massive MTV New Year's Eve bash last night, you missed quite a surprise! None other than Miley Cyrus put on a live performance to ring in 2009... in a fan's own house!

The "Miley-Sized Surprise" featured the singer/actress spending the entire day with Alison Kaprielian, a fan who spent 2008 advocating for cancer victims. When her mother was diagnosed with cancer a few years ago, Alison decided to fight back. While juggling school, a social life, and supporting her mom through treatment, Alison volunteered for the Pink Ribbon Club, an organization aimed at teens that raises money for and spreads awareness of breast cancer. After working so hard, you can only imagine Alison's surprise when Miley unexpectedly showed up at her house to perform in her kitchen!

But that's not all. Fairy god-Miley also granted Alison and her mom makeovers, flew Alison's best friend in from Georgia, threw the lucky gal a killer surprise party in her honor -- and invited Alison's whole high school to the final Miley performance!

If the way one spends her New Year's Eve is any indicator, then Alison will be having a very fabulous 2009 indeed! And Miley's karma meter is at an all-time high. Good going, Miss Montana!