Scooter Braun - who discovered the 'Beauty and a Beat' singer when he was just a teenager and has guided him ever since - is set to wed charity boss Yael Cohen after proposing to her at his home last night (05.01.14).
This morning he posted on Twitter: "A great night" and "loving 2014. Luckiest guy in the world :) (sic)"
Scooter, 32, also posted a link to a close up of a painting called 'Incurable Romantic Seeks Dirty Filthy W***e', by British artist Harland Miller.
Yael - who is the CEO of F**k Cancer, which she founded after her mother was diagnosed with breast cancer in 2009 - simply posted a picture of a neon writing which spelled "yes".
She also wrote: "2014, I like you."
A source told USMagazine.com: "He is really happy"
Another friend added: "They are head over heels and are so great together."
Scooter - who also managed The Wanted and Carly Rae Jepsen - and Yael have just returned to the US from the Caribbean where they have visited a number of locations including Anguilla and St. Bart's.
Shortly after ringing in the New Year, Scooter posted a picture of himself with Yael, captioned: "She was the most beautiful New Year's date."