Katy Perry goes braless beneath clingy mini dress as she supports Lady Gaga at her Las Vegas residency launch

They've had their differences in the past.

But Katy Perry was on hand to support Lady Gaga at the debut of her Las Vegas residency on Friday, enthusiastically applauding her pop rival.

The Firework hitmaker wowed in a clingy mini dress as she watched Gaga perform at Park MGM. 

Lives for the applause: Katy Perry was on hand to support Lady Gaga at the debut of her Las Vegas residency on Friday, enthusiastically applauding her pop rival

Lives for the applause: Katy Perry was on hand to support Lady Gaga at the debut of her Las Vegas residency on Friday, enthusiastically applauding her pop rival

Perry went sans bra beneath the figure-hugging garment.

Her peroxided tresses were fashioned into a pixie do and the pop princess accessorized with large drop earrings.

In one fan video, the ex-wife of Russell Brand watched on as Gaga made a dramatic entrance to the stage at the Park Theater.

The Poker Face songstress was swooped in while attached to a harness and carrying a keytar.

She was decked out in head to toe silver for the performance. 

What an entrance! Lady Gaga [pictured] swooped in while attached to a harness and carrying a keytar

What an entrance! Lady Gaga [pictured] swooped in while attached to a harness and carrying a keytar

No bra no worries: Perry went sans bra beneath the figure-hugging garment

No bra no worries: Perry went sans bra beneath the figure-hugging garment

However there has previously been some bad blood between the pair. 

Lady Gaga recently publicly clarified her opinion on pop rival Katy Perry after texts she exchanged with Kesha in February 2016 were unearthed in court documents relating to music producer Dr. Luke's defamation lawsuit.

'@katyperry & I have grown up in the industry together,' the 32-year-old A Star is Born actress - who boasts 163.9M followers - tweeted last month.

'We've gone through both celebrations & differences w/ each other. These are old texts. We've matured, gotten over the past, love each other & share deep respect. Katy is my friend and is truly a kind soul. End of story.' 

Good hair day: Perry's peroxided tresses were fashioned into a pixie do and the pop princess accessorized with large drop earrings

Good hair day: Perry's peroxided tresses were fashioned into a pixie do and the pop princess accessorized with large drop earrings

The 33-year-old American Idol judge accepted her friend's sort-of apology for secretly calling her 'mean' and 'not strong' enough to help Kesha's case since she was 'raped by the same man.'

'Do you want me to see if I can talk to [Katy]? I know she's mean,' Mother Monster texted two years earlier - according to Radar Online.

'NO [we're not friends]! Omg NO. She makes me angry about s*** [but] I just try to have empathy for her.'

Gaga (born Stefani Germanotta) gave Perry a quick high-five during her 2012 rock-doc Part of Me, but the talented twosome have never collaborated together on anything. 

She's a firework! The  hitmaker wowed in a clingy mini dress as she watched Gaga perform at Park MGM

She's a firework! The hitmaker wowed in a clingy mini dress as she watched Gaga perform at Park MGM

Dr. Luke (born Lukasz Gottwald) is hoping the private text exchange proves to the New York Supreme Court judge that the 31-year-old Praying singer defamed him, causing him to lose opportunities.

But this year alone, the 45-year-old producer has helped craft tracks for Azealia Banks, Iggy Azalea, Kim Petras, Birdman, Ne-Yo, and Baby E.

Both Katy and Kesha (last name Sebert) officially denied Dr. Luke ever raped them, and in the two-time Grammy nominee's case her 2011 deposition forced her to eventually drop her sex abuse case in 2016.

Troublemaker? Lady Gaga recently publicly clarified her opinion on pop rival Katy Perry after texts she exchanged with Kesha in February 2016 were unearthed in court documents relating to music producer Dr. Luke's defamation lawsuit. Dr Luke seen here in 2014

Troublemaker? Lady Gaga recently publicly clarified her opinion on pop rival Katy Perry after texts she exchanged with Kesha in February 2016 were unearthed in court documents relating to music producer Dr. Luke's defamation lawsuit. Dr Luke seen here in 2014

 

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