It feels like a million years ago that Miley Cyrus was a bright-eyed tween with a platinum blonde wig and a guitar. Over the past few years, her eclectic, distinctive style has made her a mainstay in fashion industry blogs, and it's no surprise that her new Marie Claire cover for the September issue showcases a decidedly mature look for the 19-year-old singer. (And, may we add, the photo is stop-in-your-tracks stunning with Cyrus's piercing blue eyes and bejeweled top.)

Inside the issue, the teen superstar talks about her tough girl attitude, her outlook on life and her relationship with fiancé Liam Hemsworth.

Since her arrival in the spotlight in 2006, Cyrus has covered dozens of magazines. In honor of her big Fall fashion cover, we rounded up 10 of her best cover looks in the slideshow below. Click though to see Miley's amazing cover girl evolution.

Which cover is your favorite? Will you pick up a copy of Marie Claire's September issue? Tell us in the comments below or tweet @HuffPostTeen!

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  • Marie Claire, September 2012

  • Marie Claire, March 2011

  • Billboard, June 2010

  • Teen Vogue, April 2010

  • Harper's Bazaar, February 2010

  • Seventeen, December 2009/January 2010

  • Elle, August 2009

  • Glamour, May 2009

  • Seventeen, September 2008

  • CosmoGirl, April 2007