Justin Bieber, 15, is a YouTube singing sensation.

He has the soul of a seasoned artist. And a legion of fans to make him legit. Justin Bieber, at 15, is a singing wunderkind.

Raised by a single mom in Stratford, Canada, Justin entered a local “American Idol”-esque competition just for fun. With no formal musical training, he dazzled the crowd with his voice, not to mention his mastery of the drums, guitar, piano and trumpet. The musical autodidact came in second at age 12.

Soon afterward, he started uploading his jams on YouTube. He’s racked up more than 10 million views so far. Even Justin Timberlake and Usher started noticing him. They actually got into a bidding war to sign with him! Usher won. But, Justin Bieber is the big winner with his single “One Time” just going Platinum in his native Canada.

Update: Watch the CNN.com Live interview

Becky Gulsvig, 26, stars in the national tour of the musical 'Legally Blonde.'

Pretty, blonde, donned in pink. Becky Gulsvig looks like the title character she plays in the musical version of "Legally Blonde," but she says she’s only half like Elle Woods. Becky says she’s determined like her. “We have the same spirit.”

That determination took her from understudying the role in the Broadway show to snagging the role in the national tour. The determination has worked hand-in-hand with years of hard work. She made her Broadway debut as Amber Von Tussle in "Hairspray." She also made stage appearances in "Peter Pan," "Grease" and "A Funny Thing Happened on the Way to the Forum."

The 26-year-old from Minnesota graduated a year early from high school and moved to New York to follow her dreams, like the character she now plays. These days she is living out that dream, traveling from city to city, as a rising musical theater star.

Update: Watch the CNN.com Live interview

Jordan Coleman, 13, funded the documentary 'Say It Loud' to make a positive impact on his community.

Jordan’s friends want to be the next Michael Jordan or rap star. But Jordan wants young African-American boys like him to focus on going to college first. Jordan, 13, used the money he made from being a voice-over actor on the Nickelodeon show “The Backyardigans” to get that message across through a documentary.

The 48-minute documentary is called “Say it Loud,” featuring Ludacris, Rev. Al Sharpton and Newark, New Jersey Mayor Cory Booker. Jordan says, “We wanted kids who are getting good grades, or men who’ve graduated from college to 'say it loud,'" Jordan says about the title of his film. “They need to be proud of what they’ve done and make sure they’re sending that message along with being a good athlete or a musician.”

Jordan is trying to show his peers that school is cool. His favorite interview of the movie was Kobe Bryant. “I never knew that his SAT scores were so high. He had such good scores he could’ve gone to any college he wanted to.”

Update: Watch the CNN.com Live interview

Andrew Robinson wrote and directed 'April Showers.'

It’s been 10 years since the massacre at Columbine High School in Littleton, Colorado, left 12 students and a teacher dead. I couldn’t believe it when I saw the date. April 20, 1999, is a date no one watching the events unfold will forget. And, as we’ve sadly seen, it wasn’t the last school shooting, with the Virginia Tech shootings and others that followed.

Andrew Robinson wasn’t watching the news from afar like most of us. He was there. Living it. Smelling it. And running from it. Andrew was in the computer lab in the middle of the campus when the shooting started. He ran to physical safety, but the days and years to come proved to be emotionally perilous.

Andrew wasn’t a filmmaker in Los Angeles, California; he was in advertising. But he sat down to write a story based on his experience at Columbine, and the screenplay for "April Showers" was born in three days. That’s when Andrew realized: “Wow, that’s been in the back of my head for all these years.” He says those years brought about side effects rarely seen in the media: guilt, community persecution and the post-traumatic stress disorder. “I’m just trying to share what I’ve learned so no one else has to go through it,” Andrew says of the goal of his anniversary film.

Update: Watch the CNN.com Live interview

Jack's Mannequin frontman Andrew McMahon started a foundation to raise awareness for cancer research.

He hustled for years with his band and it finally paid off.

Andrew McMahon and his band Jack’s Mannequin had embarked on their first U.S. headlining tour. In the middle of the tour, Andrew checked into the hospital for what he originally thought was just exhaustion and laryngitis. It was worse. Andrew was diagnosed with acute lymphoblastic leukemia. He was 22.

Despite being off the tour, his first album, “Everything in Transit” still sold 250,000 copies. Now, four years later, post stem-cell transplant and chemotherapy, Andrew is in remission and has a new album, “The Glass Passenger.” Now, he’s headlining a group he never thought he’d be fronting, the Dear Jack Foundation, to raise money and awareness for cancer research.

Update: Watch the CNN.com Live interview

J.R. Martinez, 25, is a national spokesperson for the Coalition to Salute America’s Heroes.

J.R. Martinez wanted to give back to the country that gave him and his family so much. The 25-year-old enlisted in the U.S. Army in September 2002, much to the hesitation of his El Salvadorian mom. In February of 2003, he deployed to Iraq, promising his mom he’d return in one piece. That April, he did.

His body was in one piece, but badly burned and scarred. “I knew it was going to be a bad day,” J.R. remembers of the day he was serving as the driver of his unit’s Humvee when the left front tire hit a land mine. J.R. suffered smoke inhalation and severe burns to more than 40% of his body. His mother met him at the Brooke Army Medical Center in San Antonio, Texas, to help him recover from the 32 different surgeries he’d undergo over the next 34 months.

During that time, he realized that the injury might have been a blessing in disguise. He became a national spokesperson for the Coalition to Salute America’s Heroes. He also became a lead actor on the daytime Soap Opera “All My Children,” not needing much preparation to play a veteran wounded overseas. Reacting to all his recent success and confidence, J.R. simply says, “Dream and dream big, because it’s free and it’s something no one can take away from you.”

Update: Watch the CNN.com Live interview

Sean Forbes, 26, started the non-profit Deaf Performing Artists’ Network.

Sean Forbes is a young musician. He grew up with musical parents and always had his own talent and aspirations in the field. But, Sean just happens to be deaf.

Not letting being deaf stand in the way of his dream, Sean started a non-profit called D-PAN, or Deaf Performing Artists’ Network. It aims to make the music industry and music culture more accessible to the deaf community, namely by making popular music videos ASL (American Sign Language) – enhanced. "When you tell people who aren't familiar with D-PAN that we create music videos for the deaf, they're always taken back. I love the oxymoron of it which is why it's so beautiful,” the 26-year-old says.

Whether it’s doing songs by Christina Aguilera, John Mayer or Eminem, Sean sees beauty in the way his deaf performers sign to music. The songwriters, directors and producers that make up D-PAN strive to bring the hearing and the deaf communities together with their art - an art that transcends sound and can be felt by all.

Update: Watch the CNN.com Live interview