It was a batty Halloween for Kim Kardashian and her pals in Miami last night. The group, including Kanye West, Kourtney Kardashian, Scott Disick, and Jonathan Cheban, went as characters from Batman, with Kim and Kanye taking the lead as Catwoman and Batman. They arrived at LIV Nightclub, where they not only celebrated the spooky holiday, but also belatedly marked Kim's 32nd birthday. While Kim, Kanye, Kourtney, and Scott were busy with their costumed festivities in Florida, Khloé got to work in LA. She made her debut as the new host of The X Factor with Mario Lopez, and after wrapping up the live show, quickly headed to the Staples Center to watch her husband, Lamar Odom, play in the Clippers game. Khloé was on Kim's mind, though, since she tweeted, "Omg!!! I'm literally crying! Khloe looks beautiful on the X Factor!!! Not sure why I'm crying, just so proud of my little sister!"