The impromptu show was captured on social media, showing Bieber in great spirits as he sang and pounded on a cajón. Small crowd enjoys singer’s free concert in MacArthur Park, which has often drawn headlines for less cheery reasonsWith no announcement and little fanfare, Justin Bieber performed a free acoustic set on Monday at a Los Angeles park often in local headlines for less cheery reasons.In videos that surfaced online, four musicians flanked the global phenom, who wore a plain T-shirt and shorts as he sang hits including Daisies and Yukon. Key points and original sources are listed below.

• The impromptu show was captured on social media, showing Bieber in great spirits as he sang and pounded on a cajón.S1

• Small crowd enjoys singer’s free concert in MacArthur Park, which has often drawn headlines for less cheery reasonsWith no announcement and little fanfare, Justin Bieber performed a free acoustic set on Monday at a Los Angeles park often in local headlines for...S2