"Let Me Know (I Wonder Why Freestyle)" is a song by American rapper Juice Wrld, first released for his EP, JuiceWrld 9 9 9 (2017). Due to its viral spread on TikTok and the growing popularity of its artist, the song was re-released by Grade A Productions and Interscope Records on December 7, 2019. It was the last song released by Juice Wrld before his death a day later, and is featured on the soundtrack of the video game NBA 2K21.
The song features "foreboding bass tones emblematic of Chicago's drill scene", accompanying Juice Wrld lamenting a girl who left him, while also asking about her and hoping she will come back to him.