What are the notes for the one that got away on a keyboard?

"The One That Got Away" by Katy Perry primarily features a chord progression that can be played on a keyboard using the chords C, G, Am, and F. The melody primarily revolves around these chords, with specific notes depending on the section of the song. For the verses, you can start with the notes C, E, G, and move to G, B, D, while the chorus emphasizes a catchy melody that follows the chord changes. For detailed notes, you may want to refer to sheet music or a piano tutorial specific to the song.