Cardi was amazing on Friday headlining the first night of London's Wireless Festival, and she got so amped during her performance she ripped her wig off her head and hurled it into the crowd.

Cardi continued, wearing only a wig cap.

Thing is ... she's having some regrets, and wants it back. She tweeted her plea, but the jury is out on whether the fan who caught the flying hair will return it, keep it, or cash in on e-Bay.  

So far ... radio silence. Judging from social media, the sentiment is that Cardi needs to go wig shopping before her next concert.