Big Sean seemed to have threatened Justin Bieber after the singer got a little too close with Ariana Grande during their performance at the Forum in Los Angeles, Wednesday.

The 21-year-old pop star made a surprise appearance at Grande's "Honeymoon Tour" concert. The two sang a couple of songs together including "As Long As You Love Me."

Towards the end of the song, Bieber called the former "Nickelodeon" actress, told her to stand in front him and wrapped his arms around her.

It wasn't part of the choreography because Grande looked like she was caught off guard, according to Hollywood Life. The "Bang Bang" singer quickly detached herself.

However, it seemed she couldn't get away too soon because the act was caught on video and Grande's boyfriend, Big Sean, saw it.

According to the reports, the 27-year-old rapper took to Twitter and posted threats to Bieber. But minutes after they were posted, the tweets were deleted.

Some fans were able to screengrab the messages and share them on social media.

Twitter user @AGLatest grabbed the post of the "Marvin and Chardonnay" singer, which apparently reads: "Wow."

@BIG_SEANIANA was able to capture his other tweet, which says: "This kid is about to learn not to touch my girl like that. Beliebe that."

The rapper later posted another message that seemed to be referencing to Bieber and Grande's PDA-packed performance. "So many times in my life I wish I could of been at 2 places at once," @BigSean tweeted, Wednesday.

Grande ended the concert with laser-guided versions of her chart-topping songs, "Break Free" and "Problem," noted Los Angeles Times.

Bieber might have missed Big Sean's messages because right after the concert he reached out to Grande and shared using his Twitter handle @justinbieber: "Love the stage. Thanks for having me @ArianaGrande and thanks LA. Gotta tour again soon :)"

Meanwhile, a representative for Big Sean exclusively told TMZ that the tweets were fake.

"Big Sean just misses his family and friends and it had nothing to do with Bieber," the hip hop singer's representative stated in conclusion.