Justin Bieber goes acoustic in "Yellow Raincoat."

Did you love getting down in the clurb to Justin Bieber's "Boyfriend"? How about the Nicki Minaj-assisted "Beauty And A Beat"? What about swaying side to side to some old-school "U Smile"? Pretty standard Bieber, right? Well, we think it's safe to say that Justin's come a long way since those hair-swooped, hoodied days, and even the more timely drop-crotch pants days -- because it sounds to us like he's quickly morphing into a brooding older adolescent with a lot of #feelings, at least judging by his latest acoustic jam, "Yellow Raincoat."

Listen to Justin Bieber's "Yellow Raincoat" after the jump.

Slated to appear on Justin's upcoming Believe Acoustic album (out Jan. 29!), "Yellow Raincoat" is one of a few new stripped-down releases featured on the album, and is a refreshing shift for the pop singer, showcasing his deepest and most mature lyrics to date. Rumored to be written for then-girlfriend Selena Gomez (#SADZ), Justin's voice is thick with vulnerability as he sings about the stresses of fame: "Cause the fame, and the money, and the girls will drive you crazy," before concluding, "Guess I'll put on my raincoat, my yellow raincoat/ Baby it's keeping me fright/ I put on my raincoat, my yellow raincoat/ You know exactly why." Like we said, you don't exactly need a BA in Close Reading to interpret Justin's lyrics, which kinda leaves us feeling even MORE sadz -- 'cause it looks like Selena has officially moved on. Um, Justin? We'd like to formally submit OUR application to be your muse.

+ Listen to Justin Bieber's "Yellow Raincoat."

Photo credit: UMG