There is good and bad news concerning Justin Bieber's tour:
-The bad news is that he's unlikely to play in Lebanon soon as both his official website and all the renowned ticket websites don't seem to have any information regarding when or where his next show will be.
-The good ones is that he has been away from the stage for quite a while now so he is likely to perform live soon as any artist at his level cannot disregard that part of their career for too long. If not in Lebanon, probably somewhere near as he really does have fans all over the place.
Keep an eye on his official website: www.justinbiebermusic.com or on www.justinbieberzone.com, a very complete website made by his fans from all over the world with all sorts of information (one can't even find on his official website). It is also possible to interact with other users to keep updated with all the latest news surrounding Justin Bieber.
There are also his Twitter and Instagram accounts where I'm pretty sure he will keep his fans updated on upcoming tour dates.