Katie Holmes will perform on the milestone 100th episode of FOX’s summer reality hit So You Think You Can Dance this Thursday, July 23.

In this sneak peek video from tomorow’s show, the actress chats with host Cat Deeley about her “Get Happy” song-and-dance tribute to entertainment legend Judy Garland, as well as The Dizzy Feet Foundation — a newly-formed charity group helping underprivileged children become professional dancers.

“It is to give scholarships to these young kids,” Katie tells Cat of the charity — which was a collaborative effort with Nigel Lythgoe, Dancing with the Stars judge Carrie Ann Inaba and director and choreographer Adam Shankman. “I think it is important to experience music and dancing and singing and the arts and sports. This is the next generation. I think it is important to give them every opportunity to grow and discover what it is that they like and to have access to the best.”