Halle Berry saved retired supermodel Tyra Banks years of airline misery by advising her on how not to get recognised on a long flight.
Banks admits she lives by her friend's anonymity tip whenever she's on a plane - and it never fails.
She tells Access Hollywood, "I put my airplane blanket over my head - I do that to this day... and guess who I learned that from? Halle Berry.
"She told me, 'You don't wanna get caught out there drooling down your face and somebody trying to take your picture, or bothering you'."
But there is one downside to the blanket trick - Banks doesn't get much sleep.
She explains, "I've had the flight attendants kinda shake me, like, 'You OK Miss Banks? You still breathing?'"