Dianna Agron has celebrated finishing the promo for Glee: The 3D Concert Movie, by dying her hair a shocking pink, reported People Magazine. She cut her hair into a short bob in May, and has told People that she hopes she can keep it for the show. She joins a list of celebs that have been dying their hair recently, including Lauren Conrad, Katy Perry, Kate Bosworth and Sienna Miller. Agron was spotted in Los Angeles sporting the new colour on Thursday.

Agron is the cover star for the September issue of Cosmopolitan, she told the magazine that she likes to keep her private life under wraps, and cites Lindsay Lohan as an example of what can go wrong if the private life of a celebrity is played out in the media: "It's really sad looking at people like Lindsay Lohan. She's an amazing actress, but you see what happens when people know too much about your personal life." Dianna continued, "They start not being able to look at you the same way professionally. I don't want that to happen to me." Glee: The 3D Concert Movie is out on 19th August 2011.