This is the second time Katy has stepped out with bling on her wedding finger in less than a week, leaving fans wondering when boyfriend John Mayer has proposed.
Katy walked the red carpet at London's One Embankment and didn't shy away from giving photographers a look at her left hand.
She wore a silk cream Vivienne Westwood Prestige dress with floral print to the event and styled her hair in tight curls that bobbed above her shoulders.
It was a big night for Katy, as she walked away with the Woman Of The Year award, which was presented by Kylie Minogue.
Afterwards, the Voice judge tweeted: "I presented the 1&only @katyperry with her @ELLEUK Woman of the Year award. Con-grats and con-kittens!!"
On Valentine's Day, Katy was seen wearing a diamond ring while out for dinner with John at Sunset Towers in Los Angeles.
The stars, however, have not commented on the engagement rumours.
Red carpet looks at the Elle Style Awards:
Copyright: WENN Joe