ASTRID WETT was up to no good as she left a nasty "surprise" for Mikel Arteta.

Ahead of Arsenal's clash against Chelsea, the controversial Blues fan influencer was seen at visiting the Emirates.

In a video posted on social media, she revealed a golden pin in her hand.

She said: "Psst, I’m at the Emirates, Arsenal’s stadium, and I have a little surprise for Arteta tonight."

The influencer-turned-boxer then went under a sheet covering the Arsenal bench and appeared to place it there.

However, the element of surprise for the prank may have been lost as the video went out to her 170,000 plus social media followers.

Fans had a mixed reaction to the video, with one fan saying: "You play too much Astrid."

A second said: "Relax Astrid not now."

Another said: "I hope he likes it."

A fourth added: "Hope you know you they can ban you from Emirates."

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A fifth said: "You are Chelsea's bad luck charm."

And it seems that may have been the case, given Chelsea were thumped 5-0 by Arsenal on their visit to the Emirates.

Astrid's usual content sees her in scantily clad outfits or posting reactionary content regarding Chelsea and football.