The pop artists have teamed up for the summery duet, which landed straight in at number 18 in this week's Billboard Hot 100 in the US.
"Just landed in NYC! Shooting the Good Time video with @owlcity TMR! Pray for sun! " Jepsen tweeted on Monday (July 2).
She later added: "Hey @owlcity… nice to run into you in the hotel lobby. See you at the fitting later. PS that milkshake looked mighty fine."
Young replied: "Likewise. I walked in and thought, 'she looks SUPER familiar.'. I can't wait for this shoot. See you soon!"
Jepsen recently described her Owl City duet as "amazing", with the track to be included on both their upcoming albums.
The 'Call Me Maybe' singer has almost completed her debut LP, which is expected to be released in September.
Watch the lyric video for 'Good Time' below: