High School Musical duo Vanessa Hudgens and Zac Efron have been completely inseparable since Z. was released from hospital the other day. Awwwwww! Vanessa and pal Ashley Tisdale drove round to see Zac on Friday following his successful appendix op. And Vanessa was back to check out Zac’s scars again on Saturday. She drove him to a friend’s house in her new Audi A4 convertible.