People similar to or like Demi Lovato

American singer, songwriter and actor. Jonas began acting in theater at the age of seven, and released his debut single in 2002 which caught the attention of Columbia Records where Jonas formed a band with his older brothers, Joe and Kevin, known as the Jonas Brothers. Wikipedia

American singer, songwriter, and actor. He rose to fame as a member of the pop rock band the Jonas Brothers, alongside his brothers Kevin and Nick. Wikipedia

American singer, actress, and producer. Born and raised in Texas, Gomez began her career by appearing on the children's television series Barney & Friends (2002–2004). Wikipedia

American singer and actress. Born in Boca Raton, Florida, Grande began her career at age 15 in the 2008 Broadway musical 13. Wikipedia

American singer, songwriter, dancer, and actress. Credited with influencing the revival of teen pop during the late 1990s and early 2000s, for which she is referred to as the "Princess of Pop". Wikipedia

American actress, businesswoman, singer-songwriter, producer, and writer. Duff began her acting career at a young age and quickly became labeled a teen idol as the title character of the television series Lizzie McGuire (2001–2004) and in the theatrical film based on the series, The Lizzie McGuire Movie (2003). Wikipedia