The electro-pop offering is an upbeat post-break up song which sees Selena deal with regret and heartbreak. "I think that Back to You is more of my special project that I wanted to give to season two".
The Weeknd later released a song accusing Gomez of dating him until she chose to go back to her ex. "Guess I was just another pit stop/ 'Til you made up your mind/ You just wasted my time", he sings in "Call Out My Name".
"Back To You" is one of 20 tracks to appear on the soundtrack to season two of 13 Reasons Why.
"There's no bad blood between her and Justin", the source adds of Gomez and her former boyfriend.
She also shared details about her upcoming album, which she said she's "finishing up" now.
Selena Gomez has delayed her third album out of fear she'll record a flop in the shadow of her hit "Revival".
Image Instagram Mandy Teefey
"He loves her so much, but they both know a serious relationship right now is just too much to take on".
The pair rekindled their romance past year but have since gone their seperate ways again.
The Disney alum, 25, and Bieber, 24, first dated from 2011 to 2014, and sparked reconciliation rumors after they spotted together in October 2017. Us Weekly exclusively confirmed in November 2017 that the pair were back together. A source told Us on Wednesday, May 9, that Gomez "started seeing the bigger picture" and "chose happiness" over her relationship with Bieber because none of her close family friends "really supported their relationship".
Selena is now in the process of "finishing up" the third album and she has yet to decide when the new album will reach fans.
13 Reasons Why, which was executive produced by Gomez, premieres on Netflix on Friday, May 18.