Boyfriends and girlfriends may come and go, but at least best friends are the ones you can rely on to tell you when you've gone way too far with the eyebrow crayon.
Someone who knows this is Taylor Swift, who made a pretty cute tribute to best pal Selena Gomez on her 24th birthday this week.
Clearly looking for the perfect throwback snap to commemorate Sel's big day, it seems like Tay fell right into a black hole of memories and ended up posting a rather iconic snap of the pair of them on her Instagram,
"Going through old pictures today, because @selenagomez just turned 24!" she captioned it, adding: "I can't imagine my life without you, Selena. HAPPY BIRTHDAY!"
OH YOU GUYS.
Interestingly, this is also the first post Taylor's put up following a bit of silence prompted by her ongoing feud with Kim Kardashian and Kanye West over his controversial track, Famous.
Selena was quick to back Taylor up over the spat, taking to Twitter to defend her friend.
These two have clearly been through a lot during their time in the spotlight, but it's nice to see that the core squad is still there, no matter what.
HAPPY BIRTHDAY, SELENA. Hope you celebrated it with some awkward dancing with TayTay.
J-j-jaaaz it up.