The young Australian guitar hero spent 2009 hanging with Carrie Underwood and Michael Jackson

You’ll see the Aussie guitar whiz/pop singer, 24, tearing it up throughout Michael Jackson’s This is It concert film. She tells us how she got there — and what’s next.

Feb. 8
Orianthi turns heads at the Grammys with a shred-tastic solo during Carrie Underwood’s ”Last Name”. ”I was so nervous, looking out into the audience and seeing people like Bono and Paul McCartney!”

An audition wins her a spot in the band for Jackson’s planned This Is It concerts. ”Rehearsals were intense. He was really particular. He wanted to be sure everything was perfect for his fans.”

July 7
She performs at Jackson’s memorial service. ”After Jennifer Hudson sang, I started bawling. We should have been playing the show, not his funeral.”

Oct. 27
Orianthi’s debut album, Believe, will hit shelves. ”It has an ’80s vibe. I play a solo on every song, so I’m hoping I can inspire people to play guitar — especially young girls.”

Oct. 28
This Is It is set for wide release. ”There were cameras around all the time, like the Big Brother house. After seeing [preview clips], it still feels powerful. It would have been the biggest show on earth.”