Note to everyone: don't diss Julia Roberts [1]'s manicure. 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.