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To be a fly on the wall during the girls' night out dinners!
"We met, oh my gosh, like three years ago through our mutual friend Emma Stone," she shared on the red carpet.
And when asked if the ladies indulge in any talk about boys, the 16-year-old said, "Oh yeah, of course. What else is there to talk about?"
The Grammy winner was on hand to support her pal throughout the evening.