Demetria Devonne Lovato ( lə-VAH-toh; born August 20, 1992) is an American singer, songwriter, and actress. After appearing in 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), as well as the titular character on Sonny with a Chance (2009–2011). The former film's soundtrack included "This Is Me", Lovato's duet with Joe Jonas, which peaked in the top ten of the Billboard Hot 100. After signing with Hollywood Records, Lovato released her pop rock debut album, Don't Forget (2008), which charted at number two on the Billboard 200. Its follow-up, Here We Go Again (2009), debuted at number one in the US and was certified Gold by the Recording Industry Association of America (RIAA).Lovato experimented with pop and R&B on her third studio album, Unbroken (2011), and returned to a more pop-friendly sound on her fourth studio album, Demi (2013). The album debuted with 110,000 copies sold in the US, her highest first-week sales in the country. Lovato's soul-influenced fifth and sixth studio albums, Confident (2015) and Tell Me You Love Me (2017), presented more mature lyrical content than previous works. The latter became her first album to be certified platinum by the RIAA, and its lead single, "Sorry Not Sorry", became her highest-charting single in the US, peaking at number six, and was certified 5x platinum in the US. Lovato's 2020 singles "Anyone" and "I Love Me" became her first number-one entries on Billboard's Digital Songs chart. Her collaborations "Échame la Culpa" (2017) with Luis Fonsi and "Solo" (2018) with Clean Bandit were international successes, both reaching number one in 17 countries and each certified platinum or higher in at least ten countries, including Diamond certifications in Brazil and Mexico.
As of 2017, Billboard reported that Lovato has sold over two million albums and 20 million singles in the US. She has received various awards, including an MTV Video Music Award, 14 Teen Choice Awards, five People's Choice Awards, two Latin American Music Awards, and one Guinness World Record. Lovato was also included on the Time 100 list in 2017. Outside of music, Lovato served as a judge and mentor on The X Factor USA for two seasons, appeared as a recurring character on Glee (2013–2014) and on the sitcom Will & Grace (2020), and voiced Smurfette in the Sony Pictures Animation film Smurfs: The Lost Village (2017). Her struggles with health received significant media attention in the 2010s, in response to which she published a book, Staying Strong: 365 Days a Year (2013), and executive produced the YouTube documentary Demi Lovato: Simply Complicated (2017). She is an advocate for several social causes such as gender, racial, and LGBT rights.