| 2026 | TowMovie | Nova | 34 |
| 2025 | "Couch" by Lena SituationsSeries | Self - Guest | 33 |
| 2024 | 2024 Rock & Roll Hall of Fame Induction CeremonyMovie | Self | 32 |
| 2023 | A Very Demi Holiday SpecialMovie | Self - Host | 31 |
| 2022 | The Jennifer Hudson ShowSeries | Self | 30 |
| 2020 | DAVESeries | Demi Lovato | 28 |
| 2020 | The Drew Barrymore ShowSeries | Self | 28 |
| 2020 | The Disney Family SingalongMovie | Self - Performer | 28 |
| 2020 | Eurovision Song Contest: The Story of Fire SagaMovie | Katiana | 28 |
| 2020 | Dear Class of 2020Movie | Self | 28 |
| 2020 | Game On!Series | Self - Team Venus Pannelist | 28 |
| 2019 | The Kelly Clarkson ShowSeries | Self | 27 |
| 2019 | The Masked SingerSeries | Anonymouse | 27 |
| 2019 | Desus & MeroSeries | Self | 27 |
| 2019 | Love Island USASeries | Self - Guest | 27 |
| 2018 | The Biggest WeekendSeries | Self | 26 |
| 2017 | Smurfs: The Lost VillageMovie | Smurfette (voice) | 25 |
| 2017 | Will & GraceSeries | Jenny | 25 |
| 2016 | Zoolander 2Movie | Demi Lovato (uncredited) | 24 |
| 2014 | From Dusk Till Dawn: The SeriesSeries | Maia | 22 |
| 2014 | The Tonight Show Starring Jimmy FallonSeries | Self | 22 |
| 2014 | Late Night with Seth MeyersSeries | Self - Guest | 22 |
| 2014 | Trailblazer HonorsSeries | Self - Performer | 22 |
| 2014 | From Dusk Till Dawn: Making the First SeasonMovie | — | 22 |
| 2014 | iHeartRadio Jingle Ball 2014Movie | Self | 22 |
| 2013 | Radio Disney Music AwardsSeries | Self | 21 |
| 2013 | Disney Parks Christmas Day ParadeMovie | Self | 21 |
| 2012 | The Eric Andre New Year's Eve SpooktacularMovie | Self | 20 |
| 2011 | The X FactorSeries | Self - Judge | 19 |
| 2010 | BBC Radio 1's Live LoungeSeries | Self | 18 |
| 2010 | Camp Rock 2: The Final JamMovie | Mitchie Torres | 18 |
| 2009 | GleeSeries | Dani | 17 |
| 2009 | Watch What Happens Live with Andy CohenSeries | Self - Guest | 17 |
| 2009 | RuPaul's Drag RaceSeries | Self - Guest Judge | 17 |
| 2009 | Late Night with Jimmy FallonSeries | Self | 17 |
| 2009 | Princess Protection ProgramMovie | Rosalinda María Montoya Fioré | 17 |
| 2009 | Disney Parks Christmas Day ParadeMovie | Self | 17 |
| 2009 | The Tonight Show with Conan O'BrienSeries | Self | 17 |
| 2009 | Jonas Brothers: The Concert ExperienceMovie | Self | 17 |
| 2008 | NPR Tiny Desk ConcertsSeries | Self | 16 |
| 2008 | Camp RockMovie | Mitchie Torres | 16 |
| 2008 | Studio DC: Almost LiveSeries | Self | 16 |
| 2007 | Just JordanSeries | Nicole | 15 |
| 2007 | The Alan Titchmarsh ShowSeries | Self | 15 |
| 2007 | Keeping Up with the KardashiansSeries | Self | 15 |
| 2006 | Disney Channel GamesSeries | Self | 14 |
| 2006 | The Howard Stern InterviewSeries | Self | 14 |
| 2005 | Grey's AnatomySeries | Hayley May | 13 |
| 2005 | Prison BreakSeries | Danielle Curtin | 13 |
| 2004 | Project RunwaySeries | Self - Guest Judge | 12 |
| 2004 | The SoupSeries | Self | 12 |
| 2003 | The Ellen DeGeneres ShowSeries | Self | 11 |
| 2003 | The BacheloretteSeries | Self | 11 |
| 1999 | Teen Choice AwardsSeries | Self - Presenter | 7 |
| 1997 | The Wonderful World of DisneySeries | — | 5 |
| 1992 | The Tonight Show with Jay LenoSeries | — | — |
| 1988 | LIVE with Kelly and MarkSeries | — | — |
| 1987 | Kids' Choice AwardsSeries | Self | — |
| 1981 | Entertainment TonightSeries | Self | — |
| 1975 | Saturday Night LiveSeries | Self - Musical Guest | — |
| 1975 | People's Choice AwardsSeries | Self - Host | — |
| 1974 | American Music AwardsSeries | Self - Performer | — |
| 1959 | The GrammysSeries | Self | — |
| 0 | Wake Up America!Series | — | — |
