We're not so sure how to feel about this...
Aww! It reminds us of more innocent times, when a baby-faced Biebs was in full sweep-bang mode!
Justin Bieber played a SURPRISE, low-key busk-style performance Saturday on the steps of the Avon Theater in Stratford, Ontario!
The Beebs snuck on to the those legendary steps - where he performed in that life-changing YouTube vid all those years ago - during the intermission of You're A Good Man Charlie Brown, and serenaded theater goers with Baby.
Apparantly NO ONE knew Bieberino was showing up, not even the theater director…
AND sweet Selena Gomez was peeking out in a nearby car!
Awwww, we ADORE when celebs do fun, sneaky surprises like this! It's such a thank you to those who made them famous!