Mac Miller And Ariana Grande Duet 'My Favorite Part' In New Video

(Radio.com) Ariana Grande has kept her relationship with Mac Miller semi-private, but now the couple performed their song "My Favorite Part" during a recent taping for a concert program.

Miller started the song solo but then Grande appeared from stage left and hopped right in for her verse. Miller and Grande's body chemistry was hard to miss.

They kept it coy with some sweet, wink-wink parting words: "It was a pleasure working with you," said Miller with a firm, professional handshake. "We'll be in touch," added Grande. Watch their flirty performance here.

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