Demi Lovato, Selena Gomez are no longer BFFs?

Disney stars Demi Lovato and Selena Gomez have been BFFs for, like, ever.

So what's up with Demi's snippy snipe about Selena in this video? The "Camp Rock" star was asked by a London fan how Selena is doing.

Lovato sniffs, "Ask Taylor." Is she talking about  Taylor Lautner? Or her other girlfriend  Taylor Swift?

We have no idea. Do you?