Katy Perry appeared to hit a bum note while performing for fans on Tuesday morning.

Sydney Opera House provided a grand setting for the 29-year-old singer as she performed hit single Roar on an Australian news show Rise during a global promotional missive for new album Prism.

In a typically lively performance, Katy cheerfully flashed her toned stomach in a white crop top and matching skirt as she demonstrated her workout regime by bringing a skipping rope on stage with her.

Whoops a daisy: Katy Perry inadvertently flashes her pert derriere during a performance at Sydney Opera House on Tuesday morning

The songstress barely broke a sweat as she hopped over the rope again and again – and managed to do so expertly despite her high heels.

But it was the flash of derriere that really caught the eye as her printed mini-skirt billowed during a high energy routine, this revealing a pair of stark white knickers.

Despite the calamity, the singer appeared unfazed as she made her way off the stage and back to her H๏τel, where hordes of fans were awaiting her return. 

Hear me roar: Katy Perry performed the lead single from new album Prism on Australian breakfast show Sunrise

Centre stage: Katy’s appearance on Australian TV was the latest step on her promotional campaign for the new album, which went on sale last Monday

Lively: The singer turned in an energetic display for her Australian fans

 

Hop, skip and jump:Katy made the bizarre decision to skip on her heels during Tuesday’s performance

Never one to disappoint, Katy indulged her ‘KatyCats’ with pH๏τos and autographs before making her way insider for a quick costume ahead of her flight to Tokyo – the next stop on a frenetic promotional campaign.

Much like Sydney, her fans were in attendance as she touched down at Narita International Airport in Japan on Wednesday.

Showing their support, a group of young girls made tiger-printed kitty ear headbands, gifting one to the 29-year-old Roar singer that had her name embossed on the front.

PH๏τo op: Katy indulges a fan as she arrives back at her Sydney H๏τel

.

Meet and greet: The 29-year-old singer spends time with the fans gathered outside her H๏τel on Tuesday

Feeling good: Katy was in high spirits following her performance on Tuesday morning

Thrilled to have a fun new accessory, the pop star gladly accepted, smiling as she posed for cell phone snaps with her fans.

With countless others awaiting, the Teenage Dream songstress wasn’t in a rush, being sure to squeeze in a good amount of fan pH๏τos.

Katy went for a grungy look in a white daisy-printed dress lined with lace, a black leather motorcycle jacket and Doc Martens, which completely clashed with her new orange-yellow headband – but the funky pop star was certainly able to pull it off.

Beneath her Ray-Ban wayfarers, the star’s skin appeared flawless, punched up with a glowing pink blush and coordinating lipstick.

Happy National Cat Day! Katy Perry received a gift from her KatyCats of a kitty ear headband as she arrived at Narita International Airport in Japan on Wednesday

So friendly! The pop star even played pH๏τographer for some of the fan pH๏τos

Katy was equally as happy as her followers to be in Tokyo, a destination she absolutely adores.

‘Finally! I’m in my HAPPY place! KONNICHIWA TOKYO! ILY!!!’ she tweeted.

And it turns out that the cat ears were multifunctional, representing KatyCats and National Cat Day.

‘…AND it’s national CAT day?! This is too much happiness. I am gonna explode! (cat) #tokyo #cats #(bomb),’ the Dark Horse singer, who is currently dating John Mayer, added.

Wait, let me check that! Katy stopped for a second to give her seal of approval on a pH๏τo

 

.

Meow! The Roar songstress seemed more than happy with her new gift as she posed with double peace signs for pH๏τographers

Loving life! The Teenage Dream singer didn’t have an ounce of anxiety as she arrived, gladly offering autographs with a permanent marker

Speaking to Kyle and Jakie O shortly before jetting off to Japan, Katy opened up about her notorious karaoke performance with Robert Pattinson.

‘Well, there’s the media for you, nothing is sacred, not even karaoke,’ she joked. ‘Yeah, no I mean, we were just hanging out and we have a lot of friends that we hang out, one of my best friends is a mutual friend of ours and we got wasted and did karaoke like people do.’

‘At least it shows you that we’re like actually just friends,’ the pop star added. ‘We’re like true friends.’

Elsewhere Katy criticised her fellow female pop stars for their raunchy antics.

‘Everybody’s getting naked,’ the singer said to NPR host Scott Simon in an interview she gave on October 25, which aired on Saturday.

‘I mean, I’ve been naked before but I don’t feel like I have to always get naked to be noticed.’

Although it appeared she was directing her comments at best pal Rihanna, as well as Miley Cyrus, the star refused to name names.

‘I’m not talking about anyone in particular,’ she said. ‘I’m talking about all of them. I mean, it’s like everybody’s so naked. It’s like put it away.

‘We know you’ve got it. I got it too. I’ve taken it off for – I’ve taken it out here and there. And I’m not necessarily judging. I’m just saying sometimes it’s nice to play that card but also it’s nice to play other cards.’

How fitting! The pop star styled her hair in two top buns, hiding perfectly behind her new kitty ears