How to play this song ?

These are single notes, not chords.
Each note must be played individually.

There are different notations, like, A B C , DO RE MI and Sa Re Ga.
Choose one that fits better for you.

You can distinguish the octave by the color of the note and if it is UPPERCASE (high pitch) or lowercase (low pitch). Enjoy

Who Says

Selena Gomez Pop

"Who Says" is a pop song by Selena Gomez that was released as a single in 2011. The original key of the song is A major. It was written by Emanuel "Eman" Kiriakou and Priscilla Renea, while production was handled by Toby Gad. The track promotes self-acceptance and positive body image. Notably, "Who Says" is a part of Gomez's third studio album, "When the Sun Goes Down." The melody of the song features a catchy and uplifting blend of acoustic guitar and pop elements.