Note to everyone: don't diss Julia Roberts [1]'s manicures. As ET reports, one person learned this lesson the hard way [2].

The actress may be fairly new to Instagram, but she has already perfected the art of delivering the perfect clapback. When the Instagram account The Vintage Costume Collector [3] posted a side-by-side image of Roberts and Joan Crawford, one commenter offered: "Joan Crawford looks way better in my opinion more classic and refined and Julia is wearing ugly black nail polish." Roberts's response? "It is in fact a navy polish with garnets [sic] crystals as a grounding accent. In case you would like to edit your comment from 'ugly black nail polish' to ugly navy polish with Garnet crystals. Just sayin' 💅"

Fans in the comments section are loving her response, saying, "yas Queen you tell em 👑💗" and "Julia Roberts is an icon who needs no comparison to anybody!" While trolling on Instagram is never appreciated, let this serve as a nice reminder to at least learn the correct nail polish shades before hating on someone's manicure.