It looks like Demi Lovato and Wilmer Valderrama are trying for a last minute summer romance. The two were caught flirting over Twitter last week in two different languages. Are they back together?

@wvalderramaYou are amazing.. Thank you so much love. You mean the world to me!

— demetria lovato (@ddlovato) August 23, 2012

Whoa! Where did this come from? In their Twitter exchange the two left no hint as to what might have sparked the sudden love fest. What do you think?