Anastasia “Nastia” Valeryevna Liukin (Анастасия “Настя” Валерьевна Люкина).

Nastasia Liukin, is an American artistic gymnast. She is the 2005 and 2007 World Champion on the balance beam and the 2005 World Champion on the uneven bars.

9 World Championships medals, seven of them individual, Liukin is tied with Shannon Miller as having won the most World Championship medals of any American gymnast in history.