Michelle Obama: First Lady & Role Model: First Lady & Role Model

Justin Bieber: Pop Music Superstar: Pop Music Superstar

The Muckrakers: Ida Tarbell Takes on Big Business

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Justin Bieber: Singing Sensation: Singing Sensation

Helen Keller: Educator, Activist & Author

Justin Bieber: Pop and R & B Idol

How to Analyze the Works of Frederick Douglass

Austin Mahone: Startin' Something Spectacular

Mark Twain

Selena Gomez: Pop Star and Actress

Boston Marathon Bombing

Ross Lynch: Actor, Singer, Dancer, Superstar

Cody Simpson: Pop Star from Down Under

Capital Punishment

One Direction: Meet One Direction

Carly Rae Jepsen: Call Her Amazing

Big Time Rush: Popular Boy Band: Popular Boy Band

Ariana Grande: From Actress to Chart-Topping Singer

Demi Lovato: Taking Another Chance