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

Baby

Justin Bieber Pop

"Baby" by Justin Bieber, released in 2010, is a pop and R&B song in the key of E major. It was written by Bieber, along with Christopher Stewart and Terius Nash. The song became a worldwide hit, reaching the top of the charts in several countries. It features a catchy melody and catchy chorus, showcasing Bieber's youthful vocals. The track is known for being one of Bieber's breakthrough songs, helping him gain international success at a young age.