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

Justin Bieber: Pop Music Superstar: Pop Music Superstar

Muckrakers: Ida Tarbell Takes on Big Business: Ida Tarbell Takes on Big Business

Celebrity Biographies - The Amazing Life Of Justin Bieber - Famous Stars

Justin Bieber: Singing Sensation: Singing Sensation

Helen Keller: Educator, Activist & Author: 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

Selena Gomez: Star of Wizards of Waverly Place: Star of Wizards of Waverly Place

Carly Rae Jepsen: Call Her Amazing

Big Time Rush: Popular Boy Band: Popular Boy Band

Demi Lovato: Taking Another Chance

Ariana Grande: From Actress to Chart-Topping Singer

That's a Rap

Awkward!: Your Stars' Oops, Goofs and Blushes