Selena Gomez and Taylor Swift are notoriously supportive of one another. Throughout the years, the friends have shared stages and music videos alike, so when Swift appeared in a background shot of Gomez's new music video Bad Liar, it wasn't that surprising.

What was surprising, though, was the secret Swift cameo that we all missed, because it turns out these two besties have even more tricks up their sleeves than we originally thought.

The Bad Liar poster appearance wasn't the only time Swift has popped up in one of Gomez's recent projects. As it turns out, Gomez snuck Swift's 1989 album cover in a background shot of 13 Reasons Why, and we're only just realizing it.

Taylor Swift - Selena Gomez - 13 Reasons Why - Embed -1
Credit: Netflix
Taylor Swift - Selena Gomez - 13 Reasons Why - Embed -2
Credit: Courtesy

As Buzzfeed first reported, in episode 10 of 13 Reasons Why—Sheri's Tape, for fans who have seen the series—Tyler and Sheri are standing in the Liberty High hallway. But they are not alone.

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No, right behind the pair is a poster of Swift's own 1989 album cover work.

The placement is so subtle that it has taken this long for fans to even notice, but it's undoubtedly there, staring us all in the face.

We'll chock this second surprise appearance up as yet another example of Gomez and Swift redefining BFF goals. Because who wouldn't want to make a secret cameo in 13 Reasons Why?