She is good friends with the Jonas Brothers (who also started in Camp Rock and Camp Rock 2), and dated Joe Jonas for a time in 2010. She toured with them in 2008 and 2010, and appeared in their concert movie Jonas Brothers: The 3D Concert Experience. They also co-produced her first album Don't Forget, and wrote and co-wrote several of the album's songs. She auditioned for a role on their television series Jonas, but did not get the part. On July 18, 2012, Nick Jonas joined her in Los Angeles on stage at the Greek Theatre during her Summer Tour 2012, and performed the songs "Don't Forget" and "Catch Me" with her.
Lovato starred in her only Disney Channel Original Series as Allison "Sonny" Munroe in Sonny with a Chance. In 2011, Lovato departed from the show. In October 2010, she punched a background dancer on the Jonas Brothers tour, and in November, she checked herself into a treatment center dealing with physical issues and an eating disorder. In 2011, she released an album called Unbroken, about her struggles.
|2008||Camp Rock||Mitchie Torres||lead role|
|2009||Jonas Brothers: The 3D Concert Experience||Herself||cameo|
|2009||Princess Protection Program||Rosie Gonzalez||lead role|
|2010||Camp Rock 2: The Final Jam||Mitchie Torres||lead role|
|2013||Frozen||Let It Go Performer||cameo|
|2007-2008||As the Bell Rings||Charlotte Adams||Lead role (Season 1)|
|2008||Jonas Brothers: Living the Dream||Herself||2 episodes|
|2009-2011||Sonny with a Chance||Sonny Munroe||Lead role|