Where can you buy the song hollaback boy?

You can purchase the song "Hollaback Girl" by Gwen Stefani from various music streaming platforms and online music stores, such as:

- Apple Music

- Spotify

- Amazon Music

- Google Play Music

- iTunes Store

- Bandcamp

- Deezer

- Tidal

To purchase the song, you can search for it by title or artist, and then click on the "Buy" or "Add to Cart" button. The song may be available for purchase as an individual track or as part of an album.