Pakistan, March 21 -- Christina Aguilera returns to her Disney roots with "Loyal Brave True," a new song from the live-action remake of Mulan.

The singer, a former Mickey Mouse Club member, made her charts debut in 1998 at the age of 16 with the song "Reflection" from the original animated Mulan.

"The film Mulan and the song 'Reflection' coincided with getting me my first record deal," Aguilera said in a statement. "It's amazing to come back to such an incredible movie that's full of power and meaning, and that meaning holds the test of time: staying true to yourself, being who you are, and teaching how to be fearless. My new song, 'Loyal Brave True,' represents the fine balance between vulnerability and strength."

The strings-and-pian...