It's currently "Miley Week" on The Tonight Show Starring Jimmy Fallon, a celebration of all things Miley Cyrus and her new album.
On Monday night's show, instead of performing songs from her new album Younger Now, she did two numbers dedicated to the victims of the Las Vegas shooting.
She opened the show with a cover of Dido's "No Freedom", accompanied on the guitar by Adam Sandler.
Later on she performed her song "The Climb", which she hasn't sung on stage for literally six years.
On her Twitter, Miley said: "In honor of the lives lost, injured, and affected by the tragic shooting in Vegas, Jimmy Fallon and I dedicated this show to not only mourning this horrific event but using this platform to encourage unity, peace, and hopefulness!"