10 biggest stars to walk down the 2013 MTV Movie Awards red carpet
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Why she's No. 7: While her second album "Warrior" fell far short of the success of 2010's platinum-certified "Animal," first single "Die Young" nevertheless managed to peak at No. 2 on the Billboard Hot 100 while selling over 2 million copies. Next up is an MTV reality series, "My Crazy Beautiful Life," a concert tour, and a collaborative album with indie-rock icons The Flaming Lips.
What she's doing here: Promoting "My Crazy Beautiful Life."