DaBaby, the American rapper born Jonathan Kirk, built let's go into one of his most recognisable ad-libs across songs, live clips and social media appearances. Short edits isolating the shout spread widely on TikTok, YouTube and messaging apps, where users detached it from any specific track and reused it as a standalone reaction. Its length and rising intensity made it easy to meme, parody and remix. It remains popular because the phrase is universally understood, instantly signals excitement, and works without context in almost any short video format today.