Justin Bieber took a trip down memory lane, and fans are living for it. The pop star returned to the iconic location where he filmed the music video for his 2010 hit 'Baby,' instantly sending longtime Beliebers into a wave of nostalgia as they watched a now-grown Justin relive one of his most defining eras.RELATED: What's Going On? Social Media Reacts As Justin Bieber Goes For A Segway Ride In His Briefs (PHOTOS)Justin Bieber Goes Down Memory Lane With Acapella Version Of 'Baby'On Thursday, Dec. 11, Justin Bieber uploaded a video to Instagram that had supporters deep in their feelings.