Demi Lovato has come a long way since Barney & Friends! Lovato hit Craig’s in West Hollywood with childhood friend and BFF Selena Gomez this year, and she debuted a new look. In anticipation of her Neon Lights tour, the 21-year-old singer died her hair hot pink!

SEE ALSO: Selena Gomez, Demi Lovato BFFs! After Justin Bieber Arrest The Close Friends Grab Dinner

We know that the X Factor judge has been playing with a lot of different looks these days  —her bold blue hair look being her most recent, but Lovato has gone through many transformations in during her time in showbiz. Do you remember her style during her Disney Channel TV show Sonny With A Chance?

Demi Lovato Demi Lovato looks so young during her 2009 panel for her Disney Channel series Sonny With A Chance!

Lovato quickly became a breakthrough star with her performance in the Disney movie Camp Rock in 2008 with the Jonas Brothers. That September, she released her hit debut album, Don’t Forget. Who can she forget she briefly dated her Camp Rock co-star Joe Jonas?

SEE ALSO: Demi Lovato Sexy Bikini Body Inspires Fans!

Joe Jonas and Demi Lovato Joe Jonas and Demi Lovato perform on ABC's Good Morning America way back in 2010!

The “Neon Lights” singer has gone through a lot of hardship, though, and she has been able to show strength and resilience in spite of her struggles. She dealt with eating disorders, cutting herself, and addiction problems, and eventually, she checked into rehab. 

Lovato, during the touring for Camp Rock 2 with the Jonas Brothers, hit her breaking point. "I was performing concerts on an empty stomach," she said in an interview with 20/20 in 2011. "I was losing my voice from purging. I was self-medicating. I was not taking medication for depression, and I literally was so emotionally whacked out that I took it out on someone that meant a lot to me."

SEE ALSO: Demi Lovato, Joe Jonas Feud After Shocking Sex And Drug Confessions

Demi Lovato Demi Lovato has not commented on her alleged nude photo scandal.

The X Factor judge was hit hard in 2013 when her estranged father died. But she took the death in stride: Lovato announced on Good Morning America how she would honor his father. "I'm a firm believer that everything happens for a reason," Lovato revealed. "And I've dealt with mental illnesses [and] my father also dealt with mental illness, and he wasn't able to function very well in society.” She explained, “That happens to a lot of people, and this week I'm launching the Demi Lovato Treatment Scholarship program. And I'm basically helping one person at a time — I'm going to pay for their treatment." Way to go!

Demi Lovato New year, new Demi! Demi Lovato is getting healthy and strong for 2014.

Lovato won’t be returning to X Factor this year, but we can look forward to a great tour and a lot of great looks for the inspiring star!

The singer has indulged in a more edgy style lately, but which of Demi Lovato’s many looks was your favorite? Let us know your take in the comments section below!