'The Voice' judges performed together in tribute to former contestant Christina Grimmie

'The Voice' judges performed together in tribute to former contestant Christina Grimmie

The next season of NBC's reality singing competition The Voice doesn't begin until September 19, but in a special preview episode that aired Sunday night after the Olympics, viewers got a taste of what this season will look like — and got to see all four judges unite for a powerful tribute to former Voice contestant Christina Grimmie.

Grimmie made it to the final three on the sixth season of The Voice. In June, the 22-year-old was shot and killed while singing autographs after a show in Orlando. 

On Sunday night's special episode, the four judges, including newcomers Alicia Keys and Miley Cyrus, performed a cover of Aerosmith's "Dream On," which was dedicated to Grimmie's memory, Rolling Stone reports.

See the whole powerhouse performance below: