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\t\t\t\t<\/p>\n Ariana Grande<\/strong><\/a> was repping Oz when she took the stage as a surprise guest during Mariah Carey<\/strong><\/a>\u2018s Christmas concert on Saturday night (December 9).<\/p>\n The 30-year-old \u201cthank u, next\u201d pop star and Jennifer Hudson<\/strong><\/a> joined Mariah <\/strong>for a performance of their 2020 duet \u201cOh Santa.\u201d<\/a> <\/p>\n After it was over, she shared a photo from backstage that revealed a sneaky detail in her outfit that paid tribute to her role as Glinda in the forthcoming Wicked<\/strong><\/a><\/em> movies.<\/p>\n Read more about Ariana Grande\u2019s sneaky Wicked tribute\u2026<\/em><\/strong><\/span><\/p>\n On her Instagram story, Ariana <\/strong>re-shared a photo of herself kicked up her heels backstage. In doing so, she revealed that she\u2019s wearing ruby slippers just like Dorothy in The Wizard of Oz<\/em>.<\/p>\n \u201cYou can take the girl out of Oz\u2026. but\u2026\u201d she captioned the cute photo. <\/p>\n On the topic of Wicked<\/em>, Ariana <\/strong>recently teased that she was back in the recording studio, and two of her costars had something to say about it<\/a>!<\/p>\n Get a good look at Ariana Grande\u2019s cute look below and check out more photos from Mariah Carey\u2019s concert in the gallery\u2026<\/strong><\/em><\/p>\n <\/span><\/p><\/div>\n