Miley Cyrus arrives at the 44th Annual Academy of Country Music Awards in Las Vegas on Sunday, April 5, 2009.
Miley Cyrus arrives at the premiere of "Hannah Montana the Movie" in Los Angeles on Thursday, April 2, 2009.
Miley Cyrus, left, and Billy Ray Cyrus pose together at the premiere of "Hannah Montana the Movie" in Los Angeles on Thursday, April 2, 2009.
Miley Cyrus, left, and Taylor Swift pose together at the premiere of "Hannah Montana the Movie" in Los Angeles on Thursday, April 2, 2009.
Miley Cyrus arrives at a book signing for her book "Miles To Go" at Barnes & Noble in Los Angeles on Saturday, March 7, 2009.
Miley Cyrus in Teen Vogue, May 2009.
Miley Cyrus in Teen Vogue, May 2009.
Miley Cyrus on the cover of Teen Vogue, May 2009.
Miley Cyrus greets fans at the premiere of "Hannah Montana the Movie" in Los Angeles on Thursday, April 2, 2009.
Miley Cyrus arrives at a book signing for her book "Miles To Go" at Barnes & Noble in Los Angeles on Saturday, March 7, 2009.
Miley Cyrus, background, and Taylor Swift perform at the 51st Annual Grammy Awards on Sunday, Feb. 8, 2009, in Los Angeles.
Miley Cyrus attends her Sweet 16 Birthday Bash in Disneyland on Oct. 05, 2008.
Miley Cyrus appears onstage during MTV's 'Total Request Live' at the MTV Times Square Studios Tuesday, June 20, 2006 in New York.
Miley Cyrus Signs Copies of "Miles to Go", Barnes & Noble, Los Angeles, CA, USA March 07, 2009.
Miley Cyrus arrives at Barnes & Noble to sign copies of her book 'Miles To Go' on Thursday, Mar. 5, 2009 in New York.
Miley Cyrus at the "Bolt" Premiere in Hollywood on Nov. 17, 2008.
Miley Cyrus arrives for the 81st Academy Awards Sunday, Feb. 22, 2009, in the Hollywood section of Los Angeles.
Miley Cyrus, left, and her mother, Tish Cyrus, wait for the start of the 81st Academy Awards Sunday, Feb. 22, 2009, in the Hollywood section of Los Angeles.
Miley Cyrus arrives for the 81st Academy Awards Sunday, Feb. 22, 2009, in the Hollywood section of Los Angeles.
Miley Cyrus arrives at the 81st Academy Awards at the Kodak Theater in Los Angeles on Sunday, Feb. 22, 2009.
Miley Cyrus appears onstage during MTV's "Total Request Live" at the MTV Times Square Studios Monday, June 18, 2007 in New York.
From left, Leticia "Tish" Cyrus, Billy Ray Cyrus and Miley Cyrus arrive at the 66th Annual Golden Globe Awards on Sunday, Jan. 11, 2009, in Beverly Hills, Calif.
Miley Cyrus arrives at The 66th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 11, 2009 in Hollywood, California.
Miley Cyrus at the 51st Annual GRAMMY Awards – Salute To Icons: Clive Davis Pre-Grammy Gala, Beverly Hilton Hotel, Beverly Hills, CA USA February 7, 2009