Had the game on lock, streets serenaded
Now you lame mothafuckas lookin' devastated

from Justin Timberlake (Ft. A$AP Rocky, J. Cole & Pusha T) – TKO (Black Friday Remix) Lyrics on Rap Genius

Meaning

Being on top of the rap game his fans (streets) serenaded him, much to the devastation of his competition.

Note: serenade means

[to] perfrom a complimentary vocal or instrumental piece of music.

But in this context it means people praised his music.

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