Ever since the Disney Channel’s film “Camp Rock” hit the mainstream Demi Lovato has been rising up the ranks of teen celeb royalty. Fast on the heels of Miley Cyrus, Lovato , star of Disney’s “Sonny With a Chance,”kicked it up a notch with the Disney Channel original movie “Princess Protection Program.” Lovato co-starred with real-life gal pal and fellow Disney star Selena Gomez (“Wizards of Waverly Place”).