It looks like you might be referring to a specific track or release called "No.1" by the artist 2am (or possibly a song titled "No.1" from the 2AM discography). Could you clarify what you're looking for?

Here are a few possibilities:

1. 2AM (Korean ballad group) – They have a song called "No.1"? Actually, 2AM's discography includes titles like "This Song," "Can't Let You Go Even If I Die," "I Wonder If You Hurt Like Me," etc. I'm not aware of a major 2AM track titled "No.1," but they did release albums and singles where "No.1" could be a B-side or a specific release.

2. "No.1" by 2AM could be a specific single, OST, or collaboration.

   

3. It could also be a playlist or chart reference (e.g., "No.1 at 2AM").

Could you provide more context? For example:

• Are you looking for lyrics, release date, or where to listen?
• Is this a K-pop group 2AM, or a different artist?
• Is "No.1" the song title and "2am" the artist?

Let me know and I'll help you find the right info!