A lot of us will remember a great piece of advice we may have received and often find ourselves going back to it because it's so good.
Sometimes, it can come from a grandparent, a mate, or even a rapper from Croydon.
Warning: the video below contains strong language.
The pair discussed a lot of things, from music and upcoming albums to mental health and social media struggles.
Eilish revealed that she sometimes finds it difficult to deal with social media, with constant trolling and whatnot.
Stormzy, however, has deleted social media and gave the 'When I Was Older' singer a few words of wisdom.
The UK rapper explained: "I'm not on social media anymore.
"I just deleted everything and came off of it."
"I would love to do that," Eilish said in response.
Stormzy then started to hype up the US singer.
He said: "Without even sounding cocky or arrogant, you got to remember you're f*****g Billie Eilish, you get what I mean?
The 'Vossi Bop' rapper then went on to explain the value of enjoying 'real life' to the young singer, rather than life on social media.
"Not, like, on a gangsta one because the reality of being you is that you're lit in real life. That's what I had to remind myself. In real life, I'm lit.
"It's love, it's love, like, you walk into the room, it's love. You see people, it's love.
"It's, 'Yo, Billie, I love your new tune. Yo, Billie, that's sick. Yo, Stormz, nah, nah, nah'.
"But then we get on the internet, and it's some other s***, you know what I mean?"
"So I'm always like, yo, just believe the reality of who you are because the reality of who you are is f*****g crazy and it's amazing, and it's sick, and it's so accomplished, and it's so brilliant.
"Take [the trolling] with a pinch of salt, which is easy to say for someone who's not on the internet, of course.
"But I remember when I was there sometimes you'll take something, and then it's like, 'Well, hang on. This ain't even true'.
"So, yeah, just remember you're f*****g Billie Eilish, man. Do you know, I mean?"
To which, a starry-eyed Eilish responded: "Oh my God... best advice I've ever had."