Sources close to Zac Efron and Vanessa Hudgens, tell OK! that the adorable couple have officially gone their separate ways.

According to the source, while Zac was away in Europe promoting Hairspray, Vanessa was at a Hollywood Hills party, where eyewitnesses say she was “all over” her older date. And when someone asked about Zac, Vanessa “threw a fit and said ‘don’t mention his name!’ ”

A rep for Vanessa says the story is not true.

source