The gorgeous singer, 29, has teased the upcoming promo with a short YouTube video showing herself looking rather fabulous as she belts out the chorus of the love song.
Katy's full video will premiere on Tuesday, 19 November but until then fans will have to make do with the 40-second clip. We want more! Now!
The clip opens with slow motion scenes of ballroom dancers at what looks like a banquet. There's a couple kissing, a mother and her baby, lots of snow, a double bed, flowers… then Katy belts out her track as an owl flies past. We know it sounds weird, but it does happen!
Katy looks as sizzling as always in a red and gold dress teamed with mega red lips and her glossy black hair.
Watch the preview video for 'Unconditionally' below:
It's certainly a different look from the jungle chic she sported in the fantastic video for last single 'Roar'!
'Unconditionally' is the second track taken from Katy's smash new album Prism and was inspired by her relationship with musician John Mayer and a humanitarian trip she took to Africa.
She explained to Entertainment Weekly: "It's just a simple message about loving someone and accepting them and kind of driving at you don't have to be so self-conscious, you don't have to fear, because essentially, everybody has their stuff. Nobody comes stuff-free."
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