* Glee Season 3: If you're asking about the TV show "Glee," then "Glee 3" likely means Season 3. To know what's on it, you'd need to ask for details about the season, like:
* Specific episodes: "What songs are in the Glee 3 episode 'The First Time'?"
* Overall themes: "What are the main storylines in Glee Season 3?"
* A specific product: "Glee 3" could be a product name, like a CD, DVD, or a music playlist. To know what's on it, you'd need to specify the product.
* Something else: It's possible "Glee 3" has another meaning entirely!
Please clarify your question so I can give you a helpful answer!