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 , Sa Re Ga and numeric notation 1 2 3.
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

Hit The Lights

Selena Gomez Pop

"Hit The Lights" is a song by Selena Gomez in the key of F# major. It was released in 2011 as part of her third studio album, "When the Sun Goes Down." The song was written by Leah Haywood, Daniel James, Tony Nilsson, and Myah Marie. It is an upbeat and energetic pop track, with catchy melodies and lyrics about living in the moment and letting go of worries. A fun fact about the song is that it was originally intended for Rihanna, but Selena Gomez ended up recording and releasing it.