Selena Gomez mourns past relationships in "Sad Serenade."

We're generally used to seeing Selena Gomez looking all, "laughing at the airport with my stepdad," "making 'goo-goo' faces at my baby sister," and "taking reunion selfies with my former 'Wizards Of Waverly Place' co-stars." But that doesn't mean that the girl can't occasionally smudge her mascara/loosen her false lashes with a good puffy-eyed cry over a failed relationship! And although it's set to hazy, synth-laden, bombastic beat, Selena's new jam, "Sad Serenade," is definitely less cheerful than what we've come to expect from the "Come & Get It" singer.

Listen to Selena Gomez's "Sad Serenade" after the jump. 

Anyway, we know you're probably thinking: "Sad Serenade," which didn't quite make it on to Selena's upcoming Stars Dance album (speaking of sad!!), is an ode to Sel's maybe-on-maybe-off relationship with Justin Bieber. And yes, judging by the lyrics, we have to agree that it probably is about Sel's roller-coaster romance with the milli-pack "Heartbreaker." Selena seductively coos, "I won't regret what I won't forget/ Memories and your number/ Are all I have left.../ A sad, sad serenade/ Sad serenade/ We almost got it right."

"Sad Serenade" is tough on the emotions, but honestly, if "almost getting it right" consists of taking fierce "Jenny From The Block"-themed selfies with your maybe ex, then, like, isn't "almost" enough??

+ Listen to Selena Gomez's "Sad Serenade."

Photo credit: Hollywood Records