Simon Cowell hit the red carpet for the season three premiere of The X Factor USA yesterday (September 5) in West Hollywood.

The music mogul was joined by fellow returning judge Demi Lovao, as well as new additions to the panel Kelly Rowland and Paulina Rubio.

Lovato went for an 1980s' inspired power-suit for the premiere, donning a Dion Lee jacket with exaggerated shoulder pads, Vince cropped trousers and Saint Laurent pointed shoes.

Rowland, who was previously a judge on The X Factor UK, stunned in a daring plunging grey cropped top which she paired with a matching high-waisted skirt with a slit up the front.

Rubio chose a white long-sleeved smock dress with buttons down the back and intricate beading around the hem and sleeves.

The show's host Mario Lopez was also in attendance with his pregnant wife Courtney Mazza.

The X Factor's third season will premiere on Wednesday, September 11 at on Fox.

Simon Cowell

Demi Lovato

Kelly Rowland

Paulina Rubio

Mario Lopez, Courtney Mazza