When Katie Holmes shows off her dance moves on the 100th episode of "So you Think You Can Dance," she will prove she's got the stuff!

"She's really blossoming into a gorgeous triple-threat star," choreographer Mia Michaels told People magazine. "So, I'm excited. I saw clips of it and it's brilliant!"

As ET earlier reported, the actress' performance will be an homage to Judy Garland, and she will dance and sing to Garland's classic song "Get Happy."

Holmes has teamed up with "So You Think You Can Dance" co-creator Nigel Lythgoe, "Dancing with the Stars" judge Carrie Ann Inaba and director and choreographer Adam Shankman to create the Dizzy Feet Foundation.

The Dizzy Feet Foundation will provide scholarships and assistance to talented underprivileged youth to help them realize their dreams of becoming professional dancers, and create awareness about the positive impact that dance can have on the growth and development of our nation's youth.

Holmes will perform and introduce the public to the new foundation on the milestone 100th episode of "So You Think You Can Dance," Thursday, July 23 on FOX.