'Charlie St. Cloud' premiere: Zac Efron, Vanessa Hudgens are STILL adorable

It's been a few years since they were together in the "High School Musical" films. But Zac Efron and his girlfriend Vanessa Hudgens are still going strong and are still the cutest darn couple in Hollywood.

What makes their relationship work when so many other Young Hollywood hookups fail? We haven't a clue, sorry. If we did, we'd bottle it and sell it on Robertson Blvd, from a stand right outside the Ivy.

All we know is that at Tuesday (July 20) night's LA premiere of "Charlie St. Cloud," Vanessa was golden in a sleeveless Reem Acra satin minidress with Jimmy Choo metallic heels and a Ferragamo bag.

Zac wore a trim Prada suit, a Gentry tie bar and (surprise) Ferragamo shoes. Do these kids share a stylist? Is that their relationship success secret?

Speaking of success, "Charlie St. Cloud" -- and Zac's performance --  are both getting rave reviews on Twitter as well as a Dish Rag Rave. Could this film be the new "Ghost?" It opens on July 30. Are you going?

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