TORONTO -- Justin Bieber has surprised his fans with plans for an intimate benefit concert in Toronto next week.

The pop superstar tweeted today that he'll perform at the Danforth Music Hall on Dec. 7 to benefit an outreach centre in his hometown of Stratford, Ont.

Tickets go on sale at 4 p.m. ET today via Ticketmaster.

The Stratford House of Blessing tells The Canadian Press it just learned about the concert this morning when Bieber's label Universal Music Canada called.

The organization says Bieber's mother used its services when he was little.

This isn't the first time Bieber has donated to the outreach group, which has a food bank and helps those in need through various services.

Last year, he and his grandmother donated several of his childhood items, which the group auctioned off on eBay for $64,000. He's also donated $10,000 to the group.

Today, Bieber tweeted at the Stratford House of Blessing with the message: "Thank you for being there when we needed you :) now it's my turn."

Bieber has been storming the charts lately with his new album, "Purpose."