Complex sentence: She then embarked on a final leg of the tour in East Asia/Korea with the final concert of the tour took place at the Mandalay Bay Events Center in Las Vegas on December 31,2007.
Split into simpler sentences: She then embarked on a final leg of the tour in East Asia/Korea. The final concert of the tour took place at the Mandalay Bay Events Center in Las Vegas on December 31,2007.