LOS ANGELES (CBS) — Pop star Gwen Stefani is making a very special appearance on “Carpool Karaoke” on “The Late Late Show with James Corden” tonight.

But the real question is — who’s in the backseat?

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Corden picked up two mystery guests for the newest installment of his hit segment — but the identities won’t be revealed until tonight’s show.

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Be sure to tune in on CBS tonight for the full reveal!

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