Justin Bieber stages ear-splitting shows

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

Alex is the bassist in Cobra Starship and is currently supporting Justin on his My World Tour.

The teen star has recently visited Mexico and South America where the shows have been a huge success.

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

DJ Tay James is Justin's tour DJ and has been with the young star almost from the outset. The DJ is thrilled to see so many excitable crowds.

"Everything's been cool. Everything's been great," DJ Tay said. ''ve been with him since his second show and just to see him do shows with 300 people to us doing [shows with] 50,000, it's crazy. I'm just happy to be in the position that I am. That's like my little brother."

Justin has recently recorded a Christmas LP titled Under the Mistletoe which features a duet with Mariah Carey. The song will be a re-recording of her smash hit All I Want for Christmas, and Justin collaborated with other stars for tracks on the album too.

DJ Tay predicts that Justin's Christmas record will be a big hit with fans.

"You guys got to get ready for this Christmas album. It's amazing. It's probably one of the best Christmas albums that I ever heard," he gushed.