Canadian superstar Justin Bieber has teased fans by admitting that his new run of live dates will be his best yet.

Writing on his official Twitter page earlier this afternoon (September 10), the 'As Long As You Love Me' sensation told his 27.7 million followers that they won't know what's hit them when they finally get to check out his new set:

"Getting off #AGT stage and i just gotta say...people are not ready for this tour! #BELIEVEtour is gonna make people BELIEVE! hyped!"

The talented hitmaker also shared a reminder that his new book, entitled 'Just Getting Started', will be made available on September 13 and he joked that it even includes a section on Mariah Yeater, who claimed to have been pregnant with his baby:

"The new book #JustGettingStarted hits stores this week. got a lot to say in there. even about YEATER. lol."

Watch the promotional video for Bieber's forthcoming book below: