Rihanna Doesn't Hold Back Mentoring 'The Voice' Contestants: Watch

Courtesy of NBC
Rihanna on "The Voice."

Rihanna is making her debut on The Voice in two weeks -- but the hype is already starting. 

On Heels of Emmy Win, 'The Voice' 'Is a Really Happy Place to Be,' Says Executive Producer

In a new preview of the episode (which airs Oct. 26), RiRi is shown telling contestants exactly how it is via choice soundbites like "Don't you dare sass me" and "What in the heck was that?" The excitement is palpable among both contestants and judges as the singer shares some pro tips to prepare the singers for the knockout round.

Watch the full preview below: