Selena Gomez had a very good reason to not being at Saturday's Kids' Choice Awards -- she was busy being giddy at a Celine Dion concert in Las Vegas!

The 23-year-old singer swung by Dion's Las Vegas show at The Colosseum at Caesars Palace to catch the last night of the Canadian crooner's residency before a two-month hiatus.

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In true fangirl style, Gomez and her friends sported T-shirts emblazoned with Dion's face. 

The "Good For You" singer happily documented the evening on Snapchat, where she even appeared teary-eyed and emotional during Dion's performance.

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But unlike most people, Gomez got the ultimate fan experience, hanging out with Dion backstage before the show!

Dion's return to Las Vegas has been a big deal. She started her residency back up on Feb. 23, almost six weeks after both her husband and former manager, René Angélil, and her brother, Daniel Dion, died after battles with cancer within days of each other.

WATCH: Celine Dion Pays Tribute to Late Husband Rene Angelil in Triumphant Return to Las Vegas Stage

The "My Heart Will Go On" singer's return show featured a moving tribute to Angélil and included family photos and videos. At one point during "All By Myself," Dion had to stop singing momentarily to regain composure.

Dion says she still talks to her late husband "all the time." Find out more in the video below.