* EarWorm: "Love Song" and "King of Anything"
** "Gonna Get Over You" can qualify too.
* HilariousInHindsight: "I Choose You" got a significant amount of radio airplay in 2014-15 and went gold. It also sounds like exactly the sort of SillyLoveSong that she wrote "Love Song" as a TakeThat against.
* SignatureSong: "Love Song" though people also associate her with "King of Anything" and "Brave".
* SleeperHit[=/=]SuspiciouslySimilarSong: "Brave" became one after critics accused Music/KatyPerry of copying the song for her single "Roar".