Katie Holmes showed her best moves during a Judy Garland tribute on "So You Think You Can Dance" -- and hubby Tom Cruise proved he could groove during his cameo in "Tropic Thunder."

Tell "Extra" -- Which Cruise has better moves?
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Katie Holmes showed her best moves during a Judy Garland tribute on "So You Think You Can Dance" -- and hubby Tom Cruise proved he could groove during his cameo in "Tropic Thunder."
Tell "Extra" -- Which Cruise has better moves?
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