Dianna Agron has debuted pink hair while promoting “Glee: the 3D Concert Movie” and made a vow to keep her personal life out of the public eye.

Yesterday the 25-five-year old “Glee” star explained her pink hairdo writing, “Hey all! The pink is for work,” on her Twitter account. “Tried to keep it a surprise… so, that is all I will say!”

Agron remains tight-lipped about more than her hair styles, and confided in Cosmopolitan magazine that she refuses to let her personal life affect her professional life.

“It’s really sad looking at people like Lindsay Lohan,” the actress told the magazine. “She’s an amazing actress, but you see what happens when people know too much about your personal life,” Agron says of Lohan’s highly publicized legal problems.

“People start not being able to look at you the same way professionally. I don’t want that to happen to me.”

Staying out of headlines has the actress convinced that it helps her stay level-headed. Her widespread popularity as “Glee” cheerleader Quinn Fabray also landed her a role in the recent movie “I Am Number Four.”

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Agron was born in Savannah, Georgia and raised in San Francisco and attended a Hebrew school. She claims today that she is “the happiest that I have ever been. Ever.”

“High school, middle school – I’ve loved every part of getting older and growing, but I definitely think that this is the most I’ve ever felt like myself and that I’m being treated like who I feel I am,” said Agron.

Fans took to Twitter to express reactions to Agron’s hot pink hair, and Agron showed gratitude saying, “Thanks for all the nice comments on it! #barbiepink.”

One fan asked Agron if her reflection is “a shocker” in the morning. Agron replied, “Keeps surprising me, yes!”