Encino, California - Fans are questioning Selena Gomez's most recent Tik Tok video, in which she may have thrown shade at her ex Justin Bieber!

On Tuesday, the singer shared a video of herself sipping some Coca-Cola in a red sweatshirt.

In the clip, Selena can be seen lip-synching: "So, you're telling me that you can read his astrological birth chart, but you can't read the red flags?"

She ended by taking another sip of soda before adding, "Sis."

Britney Spears Inside Britney Spears' "happier" next chapter after a tumultuous year!

Obviously, the Spring Breakers star didn't name-drop her ex, and it's also possible the whole video was only done for fun. However, this didn't stop fans from sharing their thoughts in the comments.

Because Selena mentioned "red flags," users immediately assumed she was referring to her on-again-off-again relationship with Justin.

"He was a pisces sis u didn't read that either," one person commented.

"Bestie his name started with a J," another user wrote.

One person did try to come to Selena's defense by writing, "She is the Selena Gomez, if she doesn't want to read the red flags it's not a problem."

The former Disney star's relationship with Bieber was definitely complicated. The two began dating in 2010 and after years of breaking up to make up, they officially split in 2018.

Justin moved on and married Hailey Baldwin. The 28-year-old has never publicly commented on her ex's marriage.

Yet, in 2020, it was reported that Selena was "at peace" with Justin marrying Hailey.

Did something happen to change her mind?

Whatever the case may be, today is Selena's 29th birthday, so she's probably focused on celebrating rather than past romances.