"And stroll up at 15, freaking out that Justin Timberlake is there and he's like 'You have big feet for a girl'."
The This Is Us star doesn't hold it against the Can't Stop the Feeling hitmaker as she's sure he can't recall the incident, but admits she still thinks about what he said.
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She continued: "I'm sure he doesn't remember this at all, but I was so impressionable and I thought the world of him. He was on a pedestal, and I mean 16 years later it's stuck with me. It really scarred me emotionally."
Actor Matthew Broderick - who was also appearing on the show - asked the star how big her feet were, to which she said she wore a size 10 shoe, but it was balanced out by her height.
She said: "Size 10, but I'm 5'10" so [it works out]. But I was going through puberty at the time, you know what I mean? It was embarrassing."