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Celine Dion, Selena Gomez

Cashman / Caesars Entertainment

When the pop princess met the queen...

Selena Gomez and her girlfriends attended one of Céline Dion's residency concerts at the Colosseum at Caesar's Palace in Las Vegas Saturday night and were the ultimate fans. Gomez posted on her Snapchat photos and videos from their girls' night out, including clips of the group buying and wearing Dion T-shirts and watching and singing along at the concert.

And if the night couldn't get any better for the singer, Gomez got to meet the fellow singer backstage. Both women looked gorgeous and glamorous—Dion, 47, wore a sleeveless burgundy jumpsuit, paired with a golden belt and matching stiletto sandals while Gomez, 23, sported a pale pink, spaghetti strap maxi dress and beige pumps.

Selena Gomez, Celine Dion, Las Vegas Concert, Snapchat

Snapchat

Selena Gomez, Celine Dion, Las Vegas Concert, Snapchat

Snapchat

Selena Gomez, Celine Dion, Las Vegas Concert, Snapchat

Snapchat

"Queen," Gomez dubbed her idol.

Selena Gomez, Celine Dion, Las Vegas Concert, Snapchat

Snapchat

The show marked Dion's final performance at Caesar's Palace until May 17. She had recently gone on another hiatus after her husband and former manager René Angélil died at age 73 in January. She paid tribute to him during her return to the stage a month later.

A photo posted by Celine Dion (@celinedion) on

"Thanks to my fans and to the amazing Colosseum public, that night after night gave me the energy to go on and make a show that René would be proud of," Dion posted on Instagram Sunday morning.