Justin Bieber continues to get nostalgic on social media, recently posting another throwback photo of himself with ex-girlfriend Selena Gomez.

The 21-year-old "What Do You Mean?" singer posted the old photo on Saturday, Dec. 5, according to People.

Bieber posted the latest photo after it was reported that Gomez was seen kissing and hugging One Direction's Niall Horan at a party in Los Angeles the night before.

In the throwback image, Bieber is seen holding Gomez's hand while scratching his head. Gomez is seen looking down in the photo. Bieber wears a light-colored shirt, jeans and suit jacket in the photo, while Gomez dons a white dress.

Bieber captioned the photo, "Crazy throwback."

Last Tuesday, Bieber also posted a throwback photo of the former couple cozying up together on a red quad bike without any caption. After fans started discussing the meaning behind the singer's post, he added the caption, "Just a throwback calm down."

In recent interviews, both singers have discussed the possibility of reconnecting and dating again.

"When you love someone that much, even if something comes between you, it's a love that never really dies," Bieber told Billboard magazine last month.

However, Gomez has recently been getting irritated when asked about the subject.

"I'm just tired of talking about it," Gomez said in an interview with InStyle U.K.

Gomez released her second solo studio album, "Revival," on Oct. 9, 2015. The album, which topped the Billboard 200 chart, has produced the singles "Good for You" and "Same Old Love."

Bieber released his fourth studio album, "Purpose," on Nov. 13, 2015. The album, which also topped the Billboard 200, U.S. Digital Albums and U.K. Albums charts, has produced the singles "What Do You Mean?" and "Sorry."