Niall Horan and Katy Perry.

One Directioner Niall Horan wrapped up a busy year last week with the end of his band’s world tour in Japan . . . and a new “bride” in Katy Perry.

Horan’s always been sweet on pop princess Perry, and the two happened to be in Tokyo last week doing some promo appearances on the same radio station.  They took a pic together which Niall posted on his Twitter feed, captioning it with the words, “she said yes!”

Katy’s beau John Mayer hopefully has a sense of humor, because the flirtation exists on Twitter only. Niall popped the question to Katy – and his more than 15 million followers – on October 20, but we won’t be holding our breath for wedding bells.

The two superstars seem to be good pals.  They shared a stage kiss last year during the MTV VMA Awards which Niall described as “amazing and very purple -- she had purple lipstick on. I don’t think there will ever be anything cooler than kissing her... until I marry her, maybe.”

The 20-year-old is due back home in Co. Westmeath this weekend for his nephew and godson Theo's christening. Security will be on high alert for the arrival of the star, but he’s not expected to stay for more than 24 hours before returning to London to promote One Direction’s new CD.