Justin Bieber performs on 'The Tonight Show with Jay Leno'.

Justin Bieber’s ‘Believe’ album topped the Billboard 200 this week and he found the perfect way to celebrate by performing on ‘The Tonight Show with Jay Leno’. Surprisingly, the young star was in a great form and rocked the crowd with a solid rendition of ‘Boyfriend’.

‘Believe’ scored the highest first week sales of 2012 with over 374K copies sold. The record his is fourth set to top the Billboard 200 following ‘My World 2.0′, ‘Never Say Never: The Remixes’ and ‘Under the Mistletoe’. Watch Bieber perform on ‘Jay Leno’ below:

Thanks Mr. World Premiere!

Thoughts?