AceShowbiz -

Justin Bieber took to Instagram to ask fans not to "worry" about anything. The "Sorry" singer, who was recently spotted together with ex-girlfriend Selena Gomez, uploaded some videos which capture him singing an unrecognizable acoustic song after he canceled his performance on "The Late Show with Stephen Colbert" due to some "personal issues."

While fans may have been worried about his condition, the 21-year-old singer seems to be in a good mood. In the videos he uploaded, Bieber seemingly has some good times with a friend, who plays the guitar to accompany the singer's amazing vocal. "Don't worry bout nuthin," he captioned one of the videos.

@Johnny on the belly tap

A video posted by Justin Bieber (@justinbieber) on Nov 24, 2015 at 10:58pm PST

Don't worry bout nuthin

A video posted by Justin Bieber (@justinbieber) on Nov 24, 2015 at 11:01pm PST

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A video posted by Justin Bieber (@justinbieber) on Nov 24, 2015 at 11:04pm PST

Not so long after he canceled the planned appearance, Bieber apologized to Stephen Colbert via Twitter. "My apologies to @colbertlateshow as I won't be able to make it to nyc tomorrow for the show. I look forward to making it up to you soon," he wrote. He also thanked Colbert for understanding, saying that "sometimes life kicks our ass and we need to deal with it."

Aside from Bieber's "personal issues," some fans in the comments section speculate that he is singing the song for Gomez. They say so because there is a romantic sentence in the lyrics, "I hold you close to me and I won't let you go."