Hey Zac! HAPPY 18TH B-DAY! You Rock! I saw you guys play three times this year in concert, and you were awesome each time!
Peace-Hillary

Happy Birthday Zac. I hope you have a great one. I wish you continued success in all you do. God bless you always!!! Take care. I love you!!!
Love, Amy

Happy 18th Birthday Zac, I remember my 18th, it rocked, I hope the same goes for you, and when i met you guys in New Orleans, you made my dreams come true :) Zac you kick ass!
Lori

Zac,Hope you have an awesome 18th birthday and you get everything you want! Best wishes!
~Jessica 16 FL

Dear Zac.
HAPPY 18TH BIRTHDAY ZAC FOR WEDNESDAY.
BYE FROM CLAIRE ONE OF YOUR BIGGEST FANS FROM MELBOURNE AUSTRALIA

HAPPY HAPPY BIRTHDAY ZAC. See you in Atlanta. Have fun.
Annette

Zac, Have a great 18th birthday! This is the big one that you will always remember. You are now a legal adult, so have an awesome time, but don't get into too much trouble. hehe. :)
Renee,PA
The Tour rocked! Keep it up!
Seton HIll University loves you!

I really liked seeing you and your brothers in concert at the house of blues in Anaheim. I was in the 4th row.
Cecelia

Zac, Man, where have the years gone? I can remember like it was yesterday, your hyperness on Tulsa, Tokyo, and the Middle of Nowhere. It's kind of scary that all three of you guys are growing up so fast. That made me recognize I was growing as well. You have grown as a musician, specifically as a drummer, and I'm sure as a person. I was lucky enough to see you in Columbus, Oh for the TTA tour, and then this summer in Philly for Underneath. I can't wait for the new album, to see what directions you are taking musically, and so you can show off your growth as a musician. Happy 18th Birthday, and many, many more.
Love and Loyalty Always,
Susan T.
Newark, OH

i hope you have the best birthday this year.. party hard man! love from california.. i <3 hanson b2kbabe

happy b-day to you
happy b-day to you
happy b-day dear Zaccy
happy b-day to you!!!

Hey there Zac I hope you have the best b-day ever cause you deserve the best. I went to your concert at Bogarts in Cincinnati, Ohio this year and you did an awesome job as did taylor and isaac. I wish you all the luck as you round out the tour, and hope to see you somewhere else next year playin. Good Luck and God Bless and 1 more time HAPPY B-DAY BABY!!

Happy 18th birthday Zac hope you have a wonderful birthday and hope you get what you wish for

PARABENS, JOYEUX ANNIVERSAIRE, HAPPY BITHDAY............!!!! Zac!!!
Fabienne (Paris)

HAPPY BIRTHDAY ZAC!!!
I wish you the best on your 18th birthday!! Hope you'll have a great time!! and don't drink too much ;)
Good luck in the future!!! hugs from Ulrica

i love zac hanson and wish him a great brithday 18 were does the time go i stared liking him in 1997.when he was 11 now he's a handsome 18 year old .
love your fan liss

Happy Birthday, Zac!!! It's so hard to believe you're 18! I remember like, seven years ago when I was just getting to know who Hanson was and just loving that adorable smiling face on the back of Middle of Nowhere that just happened to be yours. It's so crazy to think of how much you've grown up (and that kinda sounds cheesy but... how else can I say it?) from Jay Leno in 1997- whenever the camera was on you, you couldn't help but look at it, to now- you're no longer that adorable little eleven-year-old... now you're a hot, sexy eighteen-year-old! So.... have a fabulous 18th for because I still have a few more months... haha jk. Just have a GREAT birthday and know that you guys still kick ass!! Happy Birthday, Zac!
Love, Jess

FELIZ CUMPLEAÑOS ZAC!!!!!!!!!!!!!!! Con cariño de Alejandra Campos Miranda
La Paz - Bolivia

HAPPY BIRTHDAY ZAC! I Hope you have a SWELL 18th =D

Happy 18th Birthday! You're totally legal now! Have Fun on your b-day, Zac!
Virginia Toggle

Happy B-day! You're finally legal! Keep up the good work.

Hey Zac!
Happy 18th Birthday Zac! :) You are finally at the legal age! Hope you have fun on your birthday!
Love ya! Alyssa

Hey Zac!!!! Happy 18th birthday!!! Thanx for being here for 18 years to put smiles on our faces and warmth in our hearts!!! We all love you very much!!!
<3~***Kelli***~

Dear Zac, My name is Rebekah. I have been a fan of you Taylor and Isaac's for a long time now. I just wanted to send you a birthday wish. I hope that turning 18 is fun and exciting because it was for me. I was happy because I was finally an adult. Anyways just wanted to say happy birthday.
love your devoted hanson fan
beka

Hey Zac you're already 18 years old. It seems only yesterday you were that cute little 11 year old boy. Time sure does fly when you listening to great Hanson music. Zac you rocked at the Chicago concert. I hope all of your wishes come true. Happy Birthday! Love ya.
~Sara;0)

Happy 18th Birthday Zac
I hope you have a great day continue doing what you do best making music and please please come to South Australia we love your music so much
love sam