Apparently it all comes down to Zac’s addiction to vanity. One insider claims that Vanessa was annoyed when Zac flipped out over a zit.  Zac’s has issues with his complexion and he threw a hissy fit in the car, when thery were on their way to Vanessa’s sister, Stella’s 12th birthday party, when he noticed a huge zit on the side of his face.

He refused to go into the house. The source said, “He knew there were a bunch of girls at the party who worship him – and he didn’t want them all staring at his pimple.”  The only way Vanessa could calm Zac down was to give him her concealer to cover up the blemish.  But, says a source, “Vanessa doesn’t want to share makeup with her boyfriend.  It makes her feel weird. ”

Vanessa feels Zac is a little too self absorbed and wants him to feel more comfortable in his skin. That looks really aren’t everything.   The report goes on to say that she would just like him to be regular guy every now and then.  “Vanessa wants Zac to realize that it’s OK if he doesn’t always look perfect.  She would love him even if he didn’t look like a Teen Beat cover boy.  In fact, she would probably love him more if he relaxed about his looks and got a little scruffed up once in a while.”