Lorde & Jack's Love Fest

They've have denied They're dating, but fans are flipping over Lorde's Chemistry With Lena Dunham's Ex, Jack Antonoff At A Recent COncert

- 

If they’re truly not a couple, perhaps they should be! Lorde duetted with her producer Jack Antonoff at her April 4 show in Brooklyn’s Barclays Center, and their banter — she teased him about chewing gum — and I-only-have-eyes for-you body language had fans setting social media on fire. “If these two aren’t banging then slap me on the knee and call me Shirley,” tweeted one concertgoer. “They were FULL- ON FLIRTING,” observed another. “People even reported some knee stroking.&r