Country up and comer RaeLynn celebrated opening for her "big sister" and No. 1 supporter Miranda Lambert --that is, No. 1 supporter after her 'The Voice' coach and Lambert's hubby Blake Shelton-- by sharing an amazing photo of the backstage happenings! Lambert's Pistol Annies were also on the bill. Girl power was in full effect.

Lambert issued a hell-yeah, high-five style tweet about RaeLynn's performance at the Bismarck Civic Center in North Dakota last night (Aug. 10), since she's taken the teen under wing. The young singer, newly-signed to Republic Nashville, shared a candid photo of herself and the ladies of Lambert's all-girl trio Pistols Annies backstage.

The gals are totally goofing off and having a good time, making funny faces, sticking out their tongues, rolling their eyes and leaning on one another. It's like a backstage, ladies-only slumber party. RaeLynn has to be having the time of her life and this playful pic proves it.

RaeLynn tweeted: "Great show with my Sister Annie's @Miranda_Lambert, @guitarleena and @ashleymonroe!! Love them so much!" It's all-in-the-family for RaeLynn and her extended 'The Voice' crew. Shelton really did embrace his former charge beyond the show.

Below is Lambert's proud tweet about RaeLynn "killing it," which Shelton then retweeted.