The EDM star took to Twitter to share a 30-second video from the upcoming music video for the track, which sees him running on a treadmill whilst Katy says: ''What do you see here.
''Define obsession, define normal, define love.''
The song will be released on Valentine's Day (14.02.19).
Zedd captioned the YouTube clip: ''ZEDD & @KATYPERRY - ''365''
Activating in 12 hours
After clicking on the link in his post, a screenshot from the video is shown, with animated versions of Katy - who is dating Orlando Bloom - and Zedd in a bed, with the caption ''I'm feeling sexy'' across the bottom of the image.
It was first reported that the pair were teaming up on a song after the chart-topping DJ - who has worked with the likes of Liam Payne, Alessia Cara and Maren Morris - revealed the pair had been in the studio whilst he's supporting the 'Part of Me' hitmaker on the Australian and New Zealand leg of her 'Witness World Tour' last summer.
The 'Middle' hitmaker said at the time that he had no idea whether their song would make the final tracklisting of the pop star's follow-up to 2017's 'Witness'.
The EDM star told Australian radio presenter Smallzy in a video interview: ''I'm always relatively open about the fact that I make a lot of music with people.
''It doesn't always come out, but we've been working. I always wanted to release a song with her, so if we all get lucky, then maybe we'll finish the song and it will come out.''
The song follows Katy's 2018 festive song 'Cozy Little Christmas'.
It's not know whether '365' will be a standalone single or whether it will feature on the 34-year-old star's sixth studio album.
With the 61st Grammy Awards fast approaching, we have revised the long list of nominees once again and think we've made up our mind about who will be...
After a 21-year gap between albums and a full 19-year break as a band, Sleeper seem at last to be back in earnest.
Jay McAllister - otherwise known as Beans On Toast - brings his raucous road show to Kent's infamous seaside town.
Having announced her debut album 'When We All Fall Asleep, Where Do We Go?', Billie Eilish unveils a sinister video for her new single 'Bury a...
Imagine Dragons have now unveiled the official video for their single 'Bad Liar', following their recent animated lyric video.
Brit Award-nominated Tom Walker unveils the video for his newest single 'Just You and I' taken from his debut studio album 'What a Time To Be Alive'.
Stalker Miller have seen a will and determination come to fruition with the release of their debut album 'Homegrown By Joan'.