Last week, she was spotted going out for dinner with The Weeknd, ahead of claims she dined with the singer to get revenge on his ex-girlfriend Selena Gomez.
But Katy Perry appeared keen to shake off the mounting controversy on Sunday night, when she entertained hordes of fans by pressing on with her Witness tour.
Ever the professional, the 33-year-old singer commanded attention in a glittering asymmetrical red sheer dress, complete with a matching hood, as she took to the stage at Pepsi Center in Denver, Colorado.
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Witness the fitness: Katy Perry pressed on with her Witness tour on Sunday night, taking to the stage to perform at the Pepsi Center in Denver, Colorado
The eye-catching number, which was worn over a matching bodysuit and was cinched at the waist with a broad belt, was teamed with a pair of fire engine red patent knee-high boots.
She added an extra touch of chic to her shoulder-padded look with a pair of cat eye shades as she belted her way through a selection of her biggest hits.
Her performance came days after it was reported that her recent dinner date with The Weeknd was an act of 'revenge' after his ex Selena 'embarrassed' Katy by joining her own ex Orlando Bloom for dinner one night in May while they were still together.
Seeing red: Looking every inch the pop diva, the star lit up the stage as she stepped out in a glittering asymmetrical red sheer dress, which featured a matching hood
Biggest hits: She belted her way through a selection of her biggest hits as she took to the stage
Cinch: Her dress was worn over a red bodysuit and was cinched at the waist with a broad belt
Footwear: The star teamed her dress with a pair of fire engine red patent knee-high boots
Tour: Katy's tour, which kicked off in September, is now winding its way through North America
'Katy has a long memory and she never forgets,' the source told The Sun. 'She didn't like that everyone thought Orlando had cheated on her with Selena in Vegas that time - even though Orlando and Selena said they were just friends, it was very embarrassing for her.
'Katy is not doing anything wrong right now - Selena has moved on from [The Weeknd] with Justin [Bieber] but I think she'll love the idea that Selena will be shocked when she sees Katy and her ex out together.
'If she does get upset, it'll be payback for how Katy felt after THOSE Vegas pictures. As Taylor Swift knows, Katy doesn't forget people who've made her look bad, and she thinks revenge is a dish best served cold.'
Revenge? She took to the stage days after going on a dinner date with The Weeknd, reportedly as 'revenge' on his ex Selena Gomez after singer spent an evening with her ex Orlando Bloom
One-time-pals: Katy and Selena, pictured in 2012, have previously been known to be friends
Squad: She was backed up by a troupe of dancers, who caught the eye in their PVC outfits
Extra chic: She added a chic touch to her shoulder-padded look with a pair of cat eye shades
The Weeknd and Katy went to popular West Hollywood restaurant Madeo earlier this month.
Canadian singer The Weeknd - real name Abel Makkonen Tesfaye - and Katy arrived separately to the eatery, before joining each other at a table inside for three hours.
According to Glamour magazine, the duo were sat inside the Italian restaurant until midnight before heading home separately in different vehicles.
MailOnline has contacted a representative for Katy for further comment.
All over the world: Her tour will conclude in August, 2018, when she heads over to Australia
Spawning hits: The star has enjoyed a number of chart-topping hits from her latest album, including Swish Swish and Bon Appétit
Beau: Katy has been on and off with Orlando since her marriage to Russell Brand ended in 2012
Show must go on: Amid the reports, Katy kept things professional as she entertained her fans
Orlando was pictured looking extremely cosy with Selena last spring, when released photos showed the two stars cuddling and nuzzling each other's necks at a Las Vegas nightclub.
Orlando, 39, who was Katy's boyfriend at the time, joined 23-year-old Selena at Mandalay Bay Hotel and Casino's Light Nightclub for an after-party following the opening night of her Revival Tour.
A source told DailyMail.com that the actor was there for a bachelor party, and headed over to Selena's VIP table after she arrived, where they were seen embracing.
She's got the moves: Katy pulled out all of her best dance moves as she livened up the crowd
Platinum: The singer stepped out wearing her hair in her signature platinum blonde pixie cut
Eye eye! She added to her stage look with heavy black-and-blue eye makeup and red lipstick
Tireless: The hitmaker tirelessly worked the stage on her tour, which is set to hit the UK in June
According to TMZ, the pair were 'touchy feely', but Selena is said to have returned to her hotel room alone later that night.
The Weeknd, 27, split from Selena at the end of October and has already been romantically linked to another of his former flames, Bella Hadid, with reports recently claiming he 'still loves' the model.
Selena and The Weeknd had been together nearly a year before splitting up last month. She has been seen over the last two weeks rekindling her relationship with ex Justin Bieber.
Romance rumours: Selena and Orlando Bloom were previously linked back in 2014. They were first seen hanging out together in April of that year (pictured)
Some explaining to do?: Orlando was at the Met Gala with girlfriend Katy Perry last year
Meanwhile, just a few days earlier, The Weeknd was seen leaving his ex Bella's New York apartment late before sprinting to a waiting car.
'He is talking to Bella a lot and they've hung out too. They are not back together. There are still feelings though. Abel never stopped loving Bella,' an insider told People.
The Weeknd and Bella began dating in early 2015 but took a break in December of that same year, spending the holidays apart.
Soon to be back on? The sighting comes just a day after sources close to the Canadian rapper told E! he 'loves her still' and feels 'they will always have a real connection'
They got back together soon after and made their red carpet debut as a couple in February 2016 at the Grammy Awards.
However, it seemed they had split for good by November - but that may not be the case now.
While things aren't official between the Starboy singer and the supermodel, People's insider continued: 'Abel reached out to Bella... and she decided to see him and see where things go.
'She knows that if they don't date again, they can at least be good friends.'
Over: His reported pining for his ex Bella comes hot on the heels of the demise of his relationship with singer Selena, who is now back with her ex Justin Bieber
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