It looks like everything was pretty professional between the two, with just one possible Taylor diss thrown Harry's way during her "Blank Space" performance and no cuts to Taylor in the audience during One Direction's "Night Changes" performance.
A fan at the AMAs did, however, catch Harry's reaction to Taylor's acceptance speech for the Dick Clark Award for Excellence. And – no drama here – in the pic snapped at the show, Harry looked to be very respectful during her speech.
Zayn Malik on the other hand...
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Gallery | 2014 AMAs Red Carpet Arrivals