Justin Bieber has pushed his world tour back to the summer 2021 as the coronavirus keeps music venues closed due to social distancing guidelines.JUSTIN BIEBER CONCERT TICKETS ON SALE NOW! According to the singer’s website, the 45-date tour has been changed, and not all of the cities included in the original tour will be included on this tour. Tickets for canceled dates are set to be refunded, and tickets for rescheduled dates will be honored. Plus, 19 new arena dates were added. Tickets for the new shows went on sale on Thursday at 10 am local time.“Looking forward to seeing you all when its s…