Christina Aguilera attended Lady Gaga show in Las Vegas.
— Royce Christyn (@ChristynRoyce) February 3, 2019
Lady Gaga announced Christina Aguilera was at her Las Vegas show and fans are freaking out.
— LG Updates (@LadyGagaVegas) February 3, 2019
Here’s the video where Christina standing up in response to the shout out.
— Liberated Nation (@XtinaCHN) February 3, 2019