Katie Holmes's big performance on the 100th episode of So You Think You Can Dance is on tonight! Her tribute to Judy Garland shows Katie dancing to "Get Happy" with a whole slew of men there to keep it fun and sexy. Katie's not a professional dancer, but it's hard to resist that smile and the production looks fantastic. Don't forget to enter to win a trip to this year's finale, then tell us what do you think about Katie's performance of "Get Happy" — love it or leave it?