Demetria Devonne Lovato ( lə-VAH-toh; born August 20, 1992) is an American singer, songwriter, actress, and television judge. After appearing on the children's television series Barney & Friends (2002–2004), she rose to prominence for her role as Mitchie Torres in the Disney Channel musical television film Camp Rock (2008) and its sequel Camp Rock 2: The Final Jam (2010).
Lovato has released six studio albums: Don't Forget (2008), Here We Go Again (2009), Unbroken (2011), Demi (2013), Confident (2015), and Tell Me You Love Me (2017); all of which debuted in the top five of the US Billboard 200. She has earned nine top-20 singles on the US Billboard Hot 100 with "This Is Me", "Here We Go Again", "Send It On", "Skyscraper", "Give Your Heart a Break", "Heart Attack", "Cool for the Summer", "Sorry Not Sorry", and "I Love Me". In total, she has sold over two million albums and 20 million singles in the United States. On television, Lovato has starred as the titular character on Sonny with a Chance (2009–2011); served as a judge and mentor on The X Factor USA in its second and third seasons; and appeared as a recurring character on Glee. Her struggles with personal issues received significant media attention in the 2010s; in response to which she published a book, Staying Strong: 365 Days a Year (2013), and released a YouTube documentary about her life and career, titled Demi Lovato: Simply Complicated (2017).
Lovato is a pop, pop rock, and R&B artist. She has received various accolades, including an MTV Video Music Award, 14 Teen Choice Awards, five People's Choice Awards, and two Latin American Music Awards. She also holds one Guinness World Record, and in 2017 Time magazine named her one of the 100 most influential people in the world. Outside the entertainment industry, Lovato is an activist for several social causes.