Finally: we have some insight into Taylor Swift's songwriting method. For years, we thought that her tactics included just writing about her feelings in regards to relationships and how boys are mean - we have a lot of thoughts about that - but now we know the truth. It's drinking Diet Coke! 

According to this commercial anyway - it's the singer/songwriter's first for the company, after she signed on as the company's brand ambassador this past January. The promo features Swift in the middle of writing her hit song '22,' as she sips on a Diet Coke.

You can check the new ad out above. Understandably, it's garnering a lot of comparisons to Beyoncé's ad for Pepsi, which was released last week - you can check that one out here

RELATED: Special Places: On Taylor Swift, Helping Women, and Who Should/Shouldn't Burn in Hell

[via Business Insider]