Us Magazine reports that Tom Cruise's little missus will be paying tribute to acting legend Judy Garland by singing the song "Get Happy" from Garland's 1950 musical Summer Stock during her appearance.

A mole reveals that Holmes will be wearing an all-black ensemble—including a fedora, patent leather heels, stockings, and micro-mini skirt—for the number, and will be backed up by an octet of male dancers wearing matching suits and ties.  During the routine—which is being directed by SYTYCD producer/judge Nigel Lythgoe and was choreographed by Tyce Diorio—Holmes "seductively shakes her hips" and caps the performance by tossing her fedora in the air.

Though the air date for the performance is still unknown, it's suspected that producers will run the segment on July 8—which will mark the 100th episode of the hit series.

In the meantime, have your say in the comments section: Will you tune in to So You Think You Can Dance to see Katie Holmes hoof it?