AceShowbiz - Katy Perry is celebrating her latest U.S. chart number one in paradise after posting a breathtaking tropical rainbow photo of herself and boyfriend Orlando Bloom.

The couple jetted off to an undisclosed island paradise for Christmas and shared a snap of themselves offering up peace signs as they bask in the sunshine underneath a rainbow as they swim near a waterfall.

View this post on Instagram

end of the rainbow kind of love 🌈

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A post shared by KATY PERRY (@katyperry) on Dec 22, 2018 at 7:04pm PST

"End of the rainbow kind of love," the singer captioned the shot.

Katy has plenty to celebrate - her new single, "Cozy Little Christmas", has hit the top of the Billboard Adult Contemporary chart.