Most of these should not be a surprise:
1. Hunger Games by Suzanne Collins. Yes, still.
2. Divergent by Veronica Roth. The movie will be out in a few weeks and many students are madly reading (or re-reading) the series.
3. Catching Fire by Suzanne Collins. (see #1)
4. House of Hades by Rick Riordan.
5. Diary of a Wimpy Kid #8: Hard Luck by Jeff Kinney.
6. Insurgent by Veronica Roth. (see #2)
7. Mockingjay by Suzanne Collins. (see #1 & #3)
8. Swim the Fly by Don Calame.
9. Allegiant by Veronica Roth. (see #2 & #6)
10. Between Shades of Gray by Ruta Sepetys. The ONLY book in the Top 10 that is not part of a series. And is further proof that maybe the students do listen to my suggestions, because I've been promoting this one a lot recently. And having teachers read and recommend it.