To all that thinks that WDYDT is just a shallow pop song with cringy lyrics...well your thoughts are kinda justified.
But do you ever stop and consider to look at the lyrics in the context of the film? Yes, on the surface it's about being turned on by an ass in some jeans, but if you look at it from Ally's perspective, it does have another meaning.
The performance of this song happens at a point in the movie when Ally felt like her identity as an artist is lost, like she's turned into