Katy Perry Was a Guest of Honor at Mariah Carey's Sin City Residency

Katy Perry at Mariah Carey's Las Vegas Residency at Caesars Palace
Katy Perry was a guest of honor at Mariah Carey's Las Vegas residency
Courtesy Katy Perry

07/20/2015 AT 08:50 AM EDT

It was Diva Las Vegas Sunday as Katy Perry attended Mariah Carey's residency at Caesars Palace, where the two posed for a series of buxom backstage photos.

"Lambily 4lyfe," Perry posted on Instagram while standing admiringly before a giant poster for the singer's show Mariah #1 to Infinity. Perry looked glamorous while wearing white sunglasses, a shimmering blue dress and a pink stole tossed over her shoulder.

The 30-year-old singer then posted a photo of the two pop princesses backstage, wearing big smiles and low-cut dresses.

Perry also shared a video of the diva duo posing for the paparazzi, cameras flashing.

moments.

A video posted by KATY PERRY (@katyperry) on

Katy Perry Was a Guest of Honor at Mariah Carey's Sin City Residency

Perry posted a reverent photo of Carey's larger-than-life concert poster

Courtesy Katy Perry





Perry and her friends caught Carey's Vegas residency a week before it is scheduled to end its run July 26.

In her show, Carey, 45, performs her 18 number one hits in chronological order, while – in typical Vegas style – sporting a number of costume changes and performing on elaborate props, including a neon yellow jet ski and hot pink Thunderbird convertible.
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