INTERVIEW: Demi Lovato on surprising the students with a performance. at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

Bill Bonner (L) and Demi Lovato at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

ATMOSPHERE: Signage at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

ATMOSPHERE: Children at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

ATMOSPHERE: Children at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

EVENT CAPSULE CLEAN: Demi Lovato Joins A Day Made Better School Advocacy Campaign, Los Angeles, CA, United States, 10/05/2010

EVENT CAPSULE REPORTER/CHYRON: Demi Lovato Joins A Day Made Better School Advocacy Campaign, Los Angeles, CA, United States, 10/05/2010

Demi Lovato (c) at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

INTERVIEW: Demi Lovato on the importance of rewarding teachers for all their hard work. at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

ATMOSPHERE: Children at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

INTERVIEW: Beverly Harris on how the kids reacted to Demi Lovato performing for them. at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

SPEECH: Bill Bonner at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

SPEECH: Demi Lovato at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

INTERVIEW: Demi Lovato on why this is such a special campaign. at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

ATMOSPHERE: Children at the Demi Lovato Joins 'A Day Made Better' School Advocacy Campaign - Los Angeles at Los Angeles CA. (Footage by WireImage Video/GettyImages)

Moby on social causes, activism, hippies, punk rock, hardcore, anger, advocacy and beliefs. Produced by Uncensored Interview / ZenCat Productions. Moby Interview (clip 5) on May 08, 2008 in New York, New York (Footage by WireImage...

MS PAN Hope Center worker explaining client's options to her AUDIO / New York City, New York, United States

Adrienne Maloof, Dr. Paul Nassif at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)

ATMOSPHERE at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)

Adrienne Maloof, Dr. Paul Nassif at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)

Adrienne Maloof, Dr. Paul Nassif at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)

Adrienne Maloof, Dr. Paul Nassif at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)

Adrienne Maloof, Dr. Paul Nassif at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)

ATMOSPHERE at the OfficeMax's 'A Day Made Better' School Advocacy Campaign With Adrienne Maloof And Dr. Paul Nassif at Sherman Oaks CA. (Footage by WireImage Video/Getty Images Entertainment Video)