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

Girlfriend

Avril Lavigne Pop

"Girlfriend" is a popular song by Avril Lavigne written in the key of F major. It was released as the lead single from her third studio album, "The Best Damn Thing," in 2007. The song was composed by Lavigne, Lukasz Gottwald, and Aami Nij, and produced by Gottwald. Fun fact: the song's distinctive opening guitar riff is influenced by the song "Black Sabbath" by Black Sabbath. "Girlfriend" features energetic pop-rock elements and catchy hooks, making it one of Lavigne's most successful and recognizable songs.