|General tip: when a stranger tells you to Google Image-search something, it's NEVER a bad idea.|
Okay, I have no idea who Demi Lovato is. (A preliminary Google search shows me that she has a song out called "Give Your Heart a Break," which indicates that she and I would totally be BFF IRL.) She may very well be a huge star, but I'm too old and ignorant of pop culture to appreciate the reference. The point is: STOP WRITING IN LIBRARY BOOKS, PEOPLE. LIBRARIES AREN'T MADE OF MONEY. BOOKS DON'T GROW ON TREES well you get the point.
Just don't do it. Or, if you must, at least pick a celebrity a certain librarian would actually find worth searching for on Google Images.