Justin Bieber's 'My World' tour is the loudest thing, says Alex Suarez

Alex Suarez has described Justin Bieber's 'My World' tour as "the loudest thing".

The bassist for Cobra Starship, who serve as the opening act for the tour, told MTV News that he is amazed by the magnitude of Bieber's success but feels a kinship with the 'Baby' singer because of how the band got their own start.

"You know, it's not too different than how we kind of got our start. When we started touring, we started touring with Fall Out Boy and doing big tours," Suarez explained.

"It's really amazing. These are the largest shows that we ever played. As soon as they open the doors, there is a constant tone of scream. It is really amazing. We watched Justin's set - it's the loudest thing."

Bieber recently announced plans to collaborate with Mariah Carey on an updated version of 'All I Want For Christmas Is You', to be featured on his forthcoming Christmas album, Under the Mistletoe.

He will release the first single from the record, a track entitled 'Mistletoe', later this month.

Watch the video for Cobra Starship's 'Hot Mess' below: