In footage shared online, the Duke and Duchess of Sussex could be seen enjoying the show from the front seats of a section at the Resorts World Theatre on Saturday night.
Both wearing black ensembles, Meghan, 42, commanded attention in a sparkly, gem-encrusted outfit, teamed with a blazer, while Harry, 39, wore a sophisticated suit and a matching shirt.
They were joined in the VIP section by Celine Dion, according to Las Vegas Review-Journal. Both parties arrived separately.
Katy – who has performed for King Charles and other members of the British Royal Family at the Coronation concert after attending the crowning of the monarch in London – made headlines around the world in 2018 after making critical remarks about the Duchess’ Givenchy wedding dress.
Meghan tied the knot with Harry at St. George’s Chapel in Windsor Castle in May 2018.
Her designer dress featured an open bateau neckline and a triple silk organza underskirt which was paired with the Queen Mary Diamond Bandeau tiara.
But when asked about her opinion on the minimalistic gown, Katy advised: ‘I would have done one more fitting!’ before giving the Entertainment Tonight camera a mischievous wink.
Katy – who has met the monarch several times during work events – took to the stage at King Charles and Queen Camilla’s Coronation concert this summer.
She looked sensational in a huge gold metallic gown as she entertained the 20,000 strong audience with a selection of her most famous hits.
Beaming Katy thanked His Majesty for the privilege and revealed her honour as she gushed: ‘I got to bring my mum and stay in a castle!’.
Harry and Meghan apparently attended the pop star’s performance alongside the Duchess’ friend and fashion designer Misha Nonoo, and Misha’s husband oil tycoon Mikey Hess, according to fan accounts.
During her performance, Katy wore numerous outfits, including a stunning yellow and orange dress, featuring cut-out details. Elsewhere, the singer opted for a white frock with black and white thigh-high boots.
The Duke and Duchess are neighbours with Katy Perry and her fiancé, Orlando Bloom, after the singer and her future husband purchased an exquisite compound in the wealthy enclave of Montecito, California, for $14.2 million in 2020.
Katy and Orlando snapped up the stunning ocean view home from former Duracell and Chrysler CEO C. Robert Kidder, who owned the estate for over 20 years, according to Variety.
The couple’s gated property consists of multiple structures sitting upon 8.9 acres of land and is situated among Hollywood’s elite and even royalty with Harry and Meghan as their neighbours.
Meanwhile, it appears Harry and Meghan love to attend music concerts for their date nights, after the couple – who are parents to Prince Archie, four and, Princess Lilibet, two – were filmed at a Beyoncé performance.
In September, Meghan was spotted dancing the night away at Beyoncé’s Renaissance tour in California – but Harry appeared less than impressed as he gazed at his phone while the party continued around him.
The Duke and Duchess of Sussex were among thousands of fans who crowded into the SoFi Stadium in Los Angeles as the artist continued her world tour.
But Harry appeared disinterested as the pair were spotted in a private box along with Meghan’s mother Doria Ragland and Meghan’s Suits co-star and close friend Abigail Spencer. The members of their group, including the Sussexes, wore silver to match the singer’s request that her fans wear the colour to her show.
Meghan was seen clapping and waving her arms, while Doria, who celebrated her 67th birthday on the day, was seen dancing along to the music.
Harry however was seen with his hands firmly stuck in his pockets or glued to his phone.
Earlier this week, Harry and Meghan took their children trick-or-treating for Halloween this year.
Looking effortlessly chic, Meghan sported denim jeans, a black T-shirt and a matching hat for the family outing.
The doting mother carried her daughter, dressed in a pink ensemble, while Archie held hands with his father, who appeared low-key in a grey top, navy trousers and a black cap.
Little Archie holds on to a pumpkin-themed basket, with Harry also carrying a container ready to collect his daughter’s Halloween treats.
It’s unclear exactly where or when the image was taken. The Duke and Duchess’ former Instagram account @Sussexroyal was tagged in the photograph.