Demi Lovato: "Be Careful Who You Trust"

Demi Lovato, 19, is feeling much better about her life since her rehab stint, but she still has concerns about who she can trust.

The actress/singer tells Parade her advice on dealing with other people:

" ... be careful who you trust. Sometimes you don't know who you can and cannot trust. I still learn that over and over again."

Sad but true, Demi! Especially in Hollywood!

And how does Lovato respond when she's met with betrayal? She advises:

"The best way to deal with that is just to keep your chin up and stay strong and turn the other cheek. Kill 'em with kindness."

We wonder if Demi is talking about someone in particular ... maybe ex Joe Jonas?