Justin Bieber - Sorry ( Lyrics Video )

The song "Sorry" by Justin Bieber is not royalty-free and is under copyright. However, if you were referring to a royalty-free cover or remix, you would credit it like this:
*Song Title:* Sorry
*Artists:* [Name of the Cover/Remix Artists]
*Featuring:* [Name of the Featured Artist(s) if applicable]
*Source:* [Platform or Website]
*License:* [Type of License]
*Original Video Link:* [Full URL of the Video]
For the original Justin Bieber version, you must follow the standard credit guidelines for copyrighted music, which usually includes attributing the artist, songwriters, producers, and the label.