Taylor Swift and Taylor Lautner
Credit: Jean Baptiste Lacroix/WireImage

Remember when “Taylor squared” was a thing? After meeting on the set of Valentine's Day, Taylor Swift and Taylor Lautner dated for a few months in 2009. The relationship ended and Swift did what she does best. She wrote a song.

Fans have speculated for years that T.Swift draws inspiration from her love life to write hit songs, but the Grammy-winning singer has never confirmed.

Now, nearly seven years later, Lautner opened up about his relationship with Swift during a Facebook Live video to promote the new season of Scream Queens.

Lautner's co-star Lea Michele stirred up the topic of his past relationship and the song assumed to be about him. “You dated Taylor Swift, I remember that,” she said. “Didn't she write a song about you? I think it's something about a sweater and a hat, right?”

After Michele continued trying to figure out the name of the song, Lautner finally replied, “It's called ‘Back to December.”

“That's what she does,” Lautner said. “She writes songs.”

Of course, the actor isn't the only celebrity the 1989 singer is believed to have written lyrics for. Here are a few of Taylor Swift's love inspired song theories: