Demi Lovato

Demi Lovato got her start on the children's television show Barney and Friends at age 7, but became a household name when she starred in the Disney Channel movie Camp Rock as Mitchie opposite Joe Jonas. She then starred in her own Disney Channel series Sonny with a Chance for two seasons.

Her debut album Don't Forget was released in 2008. She also opened for her Camp Rock co-stars and friends the Jonas Brothers that year. She went on to release her sophomore album Here We Go Again in 2009, followed by the albums Unbroken in 2011 and Demi in 2013.

Demi went to rehab in 2010, but came back stronger and continues to be a huge inspiration to her fans. Demi has an honest relationship with her supporters, as she's opened up about her struggles with eating disorders, self-harm and depression, as well as drug and alcohol abuse.

Demi's hit songs include "Heart Attack," "Skyscraper," "Give Your Heart a Break" and "Don't Forget." Aside from focusing on music in recent years, she also was featured as a judge on the reality competition show The X Factor and guest starred in a several episodes of the popular television series Glee.

Demi used to make YouTube videos with her former BFF Selena Gomez, who she first met in their home state of Texas. Demi and Selena co-stared on Barney and Friendstogether and both went on to star in their own Disney Channel shows, as well as co-star in their own Disney Channel movie, Princess Protection Program. Their on-and-off friendship has been closely followed in the media.