Miley Cyrus Turns 21, See How She's Changed

Miley Cyrus turns 21 on Saturday and RadarOnline.com is taking a look at how the pop star has evolved over the years.

From Disney darling to one of the most controversial performers on the planet, Cyrus seems to be a girl who just always wants to have fun.

With her increasingly revealing costumes -- nude in her 'Wrecking Ball' video -- and her very public drug use -- smoking a joint on stage at the European MTV Awards and on the street in Amsterdam --  Cyrus keeps everybody talking and arguing.