Miley Cyrus, Jimmy Fallon and The Roots sing "We Can't Stop" a capella

Miley Cyrus let her voice take center stage -- no twerking, sledgehammer licking or Sinead O'Connor feuding -- on Tuesday's episode of NBC's "Late Night."

The 20-year-old sang an a capella rendition of "We Can't Stop" with some backup from host Jimmy Fallon and The Roots.

Check out the Brady Bunch-inspired set-up below, including Questlove's reaction to one of the song's more salacious lyrics (fast-forward to the 1:40 mark):