Justin serenaded manager Scooter and his wife Yael Cohen as they tied the knot in a star-studded ceremony in Whistler, Canada, on Sunday (6 July).
Canadian singer Justin sang The Beatles' hit 'All You Need Is Love' for the newlyweds.
Taking to Twitter, he said: "Big weekend for the team! Congrats @scooterbraun and @yael on the wedding. We killed that Love Actually surprise!"
Meanwhile, Ed performed Blackstreet's classic 'No Diggity' at the reception with American hip-hop artist Asher Roth.
Justin also took to the stage with Canadian singer Carly Rae Jepsen for a rendition of her hit single 'Call Me Maybe'.
With all of Scooter's A-list contacts, we're not surprised he had a string celebrity friends queuing up to perform!
Other notable guests included Hollywood star Tom Hanks and former One Tree Hill actress Sophia Bush.
Pop sensation Justin shared several photos on his Instagram account last night (7 July), including a photo of himself with Ed, where he declared: "@edsheeran is one of the only people on my iPod."
Sending out a message of congratulations to the happy couple, Justin wrote on Instagram: "Congrats Yael ;) u looked like a princess last night. And damn I can't believe Scooter found someone that puts up with his bs ;) love you guys."
Scooter, who got engaged to Yael in January this year, tweeted: "So much to say so much to share. Will keep it simple. Best day of my life. I love you @yael #mywife." Ahh!
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More stars who have tied the knot this year:
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