Taylor Swift gave her track ‘I Think He Knows’ its live debut during her latest ‘Eras Tour’ show last night (May 21) – watch the footage below.The pop star was performing a third and final concert at the Gillette Stadium in Foxborough, Massachusetts where she delivered a mammoth 45-song set.Towards the end of the gig, Swift treated fans to the customary ‘surprise’ segment which sees her air two different songs acoustically in each city. It is often reserved for live debuts, rarities and collaborations.The singer’s most recent show included the first outing for the ‘Lover’ cut ‘I Think He Knows’, as well as the tour debut of the title track from her ‘Red’ album.