Justin Bieber Instagram Account Reveals Mystery Woman [Photo]

Justin Bieber recently posted a photograph of himself with a mystery woman on Instagram.

The photo of the 21-year-old "What Do You Mean?" singer shows him standing in front of a woman wearing a black ensemble, who is sitting on a black car.

Bieber captioned the photo, "Lord knows," which was posted on Sunday, Dec. 13. In the photo, Bieber is blocking the woman's face from the camera and all that is revealed is her right leg.

After the photo was posted, other Instagram users began asking many questions, particularly "Who is it?" referring to the woman in the picture. Some users even claimed the image looked Photoshopped.

Bieber posted another snapshot later in the night of himself sitting in between a bunch of people in a dimly lit room. He captioned this photo, "Good times good people good luck."

The singer has yet to reveal the identity of the woman in the first photo.

While Bieber has been sharing throwback photos of himself with ex-girlfriend Selena Gomez, the woman in the photo is most likely not her, a source told People.

"They care about each other and miss each other, but they're not getting back together right now," the source said.

Plus there have been rumors that Gomez is linked to One Direction's Niall Horan. When an Instagram user recently asked whether she should get Bieber's new album, "Purpose," or One Direction's new offering, "Made in the A.M.," Gomez anwered the post choosing "Made in the A.M."

The 22-year-old One Direction member was seen watching Gomez's set at KIIS-FM's iHeartRadio Jingle Ball in Los Angeles last week. This same day the pair was spotted supposedly kissing at Jenna Dewan-Tatum's 35th birthday party.

Bieber released his fourth studio album, "Purpose," on Friday Nov. 13. So far the album has produced the singles "Sorry," "Love Yourself" and "What Do You Mean?"