is zanessa over

Rumor has it that Zac Efron and Vanessa Hudgens have broken up ... before Christmas!
Could this be true? Zac breaks everything off with Vanessa over the phone a week before Christmas?
What about her extravagant birthday gift he got her? Would he get her a brand new Audi S4 convertible then simply break up with her?
The on-screen / off-screen couple haven't been seen together for some time now ...
Vanessa has been hanging out with her pal Ashley Tisdale a lot these days ... no sigh of Zac ...
Could this teen romance be over?
What have you heard about Zanessa?