Watch NBC's The Voice season 7 promo video

The National Broadcasting Company (NBC) has released another promotional video for The Voice season 7, now with the presence of Pharrell Williams and Gwen Stefani. The video highlights new mentors and the first phase of the competition, in which candidates are presented with the hope that one coach press the button and turn his chair to choose them.

Along with Gwen and Pharrell, still going strong with Adam Levine of Maroon 5, Blake Shelton and host Carson Daly.

Rumors started a few days ago indicate that Taylor Swift will be in the program acting as an mentor to all candidates in the same way that Chris Martin participated in the last edition.

The seventh season of The Voice will premiere in the USA on September 22.

Check out the new promo video below: