Popsugar Celebrity Celebrity Friendships Demi Lovato at Christina Aguilera Vegas Concert Photos 2019 Demi Lovato Was the Ultimate Superfan at Christina Aguliera's Concert: "Keep It Up Queen" 3 June 2019 by Brea Cubit First Published: 1 June 2019 View this post on Instagram The fucking queen herself. A PERFECT, perfect show.. couldn’t believe it was opening night because it was so smooth, flawless and sounded incredible. I was entertained the entire time and was so bummed when it was over until I was reunited with this beauty. I’m so so happy I got to hug you @xtina, haven’t seen you in concert since I was 14 and I can’t believe how much life has changed since then. Honored to call you a friend 💗 keep it up queen. Oh and EVERYONE should go see #TheXperience at @phvegas!!! A post shared by Demi Lovato (@ddlovato) on Jun 1, 2019 at 9:55am PDT Demi Lovato could hardly contain her excitement on Friday as she enjoyed the opening night of Christina Aguilera's Las Vegas residency. Throughout the set, the 26-year-old "Confident" singer — accompanied by rapper Sirah and former Sonny With a Chance costar Matthew Scott Montgomery — shared videos of her singing along to some of Christina's greatest hits, including "Lady Marmalade" and "Fighter." She even shared a hilarious clip of her zooming in on her face as a single tear slowly fell down her cheek. One attendee also captured Demi energetically jamming out to "Ain't No Other Man" with her friends. Later, Demi met up with Christina backstage and snapped a few selfies for the 'Gram. "The f*cking queen herself. A PERFECT, perfect show.. couldn't believe it was opening night because it was so smooth, flawless and sounded incredible," she captioned a post. "Honoured to call you a friend. Keep it up queen." Demi and Christina definitely seem to have a special bond. In 2018, they dropped their feminist anthem "Fall in Line" — which Christina played during an intermission at her concert — and performed the duet at the Billboard Music Awards. Following the award show, Christina reflected on working with Demi on MTV's TRL, saying, "I needed somebody that not only could hit high notes, but also had meat to their tone. Demi had that, and I was like, 'Yes!' She killed the record." That's a pretty big compliment coming from the Xtina herself! Related: Demi Lovato's Swimsuit Instagrams Aren't Just Sexy — They're Incredibly Empowering View this post on Instagram Demi Lovato having a BLAST at Christina Aguilera’s show in Vegas tonight !!! #xtina #xtinaaguilera #christinaaguilera #demilovato #demi A post shared by jpasc24 (@jpasc24) on Jun 1, 2019 at 1:55am PDT 1 / 22 Image Source: Instagram user ddlovato 2 / 22 Image Source: Instagram user ddlovato 3 / 22 Image Source: Instagram user ddlovato 4 / 22 View this post on Instagram The fucking queen herself. A PERFECT, perfect show.. couldn’t believe it was opening night because it was so smooth, flawless and sounded incredible. I was entertained the entire time and was so bummed when it was over until I was reunited with this beauty. I’m so so happy I got to hug you @xtina, haven’t seen you in concert since I was 14 and I can’t believe how much life has changed since then. Honored to call you a friend 💗 keep it up queen. Oh and EVERYONE should go see #TheXperience at @phvegas!!! A post shared by Demi Lovato (@ddlovato) on Jun 1, 2019 at 9:55am PDT 5 / 22 Image Source: Instagram user ddlovato 6 / 22 View this post on Instagram My absolute bests. Forever. 💗 A post shared by Demi Lovato (@ddlovato) on Jun 1, 2019 at 9:57am PDT 7 / 22 Image Source: Instagram user ddlovato 8 / 22 Image Source: Instagram user ddlovato 9 / 22 View this post on Instagram Thanks @caesarspalace for the ride to @phvegas to see #theXperience.. definitely one for the books!!! A post shared by Demi Lovato (@ddlovato) on Jun 1, 2019 at 10:07am PDT 10 / 22 Image Source: Instagram user ddlovato 11 / 22 Image Source: Instagram user ddlovato 12 / 22 Image Source: Instagram user ddlovato 13 / 22 Image Source: Instagram user ddlovato 14 / 22 Image Source: Instagram user ddlovato 15 / 22 Image Source: Instagram user ddlovato 16 / 22 Image Source: Instagram user ddlovato 17 / 22 Image Source: Instagram user ddlovato 18 / 22 Image Source: Instagram user ddlovato 19 / 22 Image Source: Instagram user ddlovato 20 / 22 Image Source: Instagram user ddlovato 21 / 22 Image Source: Instagram user ddlovato 22 / 22 Celebrity FriendshipsCelebrity InstagramsDemi LovatoChristina Aguilera