Tish Cyrus

Leticia Cyrus -- aka the mother of Miley Cyrus -- is following in her daughter's too-mature-for-age footsteps ... by filing to have her name legally changed. Miley Cyrus wasn't born Miley Cyrus -- she was actually Destiny Hope Cyrus. She filed docs back in 2008 and had her name legally changed to…

Move over Dina and Lindsay Lohan -- there's a new mother/daughter duo burning up the Hollywood scene! Looking more like an adult than ever, "Hannah Montana" sensation Miley Cyrus (right) hit the American Music Awards red carpet on Sunday with her mother Tish (left) at her side -- 14 going on 30!…