Demi Lovato at LAX Airport

"Demi Lovato keeps it casual as she arrives at LAX Airport on Sunday (October 28) in Los Angeles.

On the same day, the 20-year-old singer and X Factor judge sang her heart out to the National Anthem at the World Series in Detroit, Mich."

(SOURCE: http://www.justjared.com/2012/10/29/demi-lovato-world-series-national-anthem-singer/)