Lady Gaga shaves off section of hair in honor of photographer friend

Are there free clippers being given out somewhere? It seems like a new celeb reveals a drastic new haircut every day, and tonight is all about Lady Gaga. But this singer didn't do it just for the thrill or to jazz up her usual 'do, she did it for a friend.

Avril Lavigne shaved part of her head, too!

"I did it for u Terry," she tweeted, linking to her blog. "I'm sorry about ure mommy. She has princess die, but were all princess high."

The photo shows the back of (at least what we think is) Gaga's head, with her hair pulled up into a high bun, revealing a triangular section of her hair shaven off.

Slideshow  19 photos

Extreme lengths: Dramatic celebrity haircuts

Whether they’re for getting into a character or just a new look, stars' extreme haircuts tend to make headlines. Check out some of the most stunningly transformative 'dos celebrities have sported over the years.

Have you seen these hair-raising haircuts?

The "Terry" Mama Monster is referring to is famous photographer and friend Terry Richardson, who posted on his Tumblr page today, "R.I.P. Annie Lomax, My Mom 1938-2012"

In 2011, he released a book titled, "Lady Gaga X Terry Richardson," which shows all of his photographs of the singer.

Related content:

• Lady Gaga bids bye-bye to blond, goes to town with brown
• Battle of the blonde Mohawks: Pink vs. Miley Cyrus
• Miley Cyrus chops off her hair
• Slideshow: Gaga for Barbie