Frazer Harrison, Getty Images for ABC
"What!?!" Scooter tweeted. "Just found out @justinbieber sold out the entire #BelieveTour North America in 1 Hour and both MSG shows clean in 30 seconds!!!!"
"Blown away. Now we are gonna make sure the #BelieveTour is as epic as possible," he added. "Thank u for supporting the kid. Amazing."
As U.S. fans gobbled up tickets, the Biebs was in Italy, where he took time out of his schedule to celebrate the box office triumph.
"Tickets are selling out everywhere," he tweeted. "I have the most amazing fans. Thank you so much. Can't wait to see you all on the #believetour!"