Happy 20th Birthday, Vanessa Hudgens!

Zac Efron (in Diesel “Thanaz 8DK” jeans) and Vanessa Hudgens (in Desert Blue “The Phoenix” jeans) whisper sweet nothings into each other’s ears while celebrating V‘s 20th birthday in L.A. on Sunday.

The 17 Again actor brought a large bouquet of flowers and carried a gift under his arms for his sweetheart!

One of Maxim’s Sexiest for 2009, Vanessa spent yesterday at the 2008 Environment Youth Conference at the L.A. Convention Center with HSM co-star Olesya Rulin.

HAPPY 20th BIRTHDAY VANESSA!

15+ pictures inside of Zac wishing Vanessa a happy birthday…