Disney has released a sneak peek of the new original song "Loyal Brave True" from Mulan. In addition to the new song, which is sung by none other than Christina Aguilera, the clip also previews some epic new footage from the upcoming live-action remake. [caption id="attachment_879268" align="alignright" width="349"] Image via Walt Disney Studios[/caption] The newly-released clip from Mulan features both new footage from the live-action re-telling of the story and a brief clip of the new original song, "Loyal Brave True." In a movie which will have no new songs, unlike the …