Country star Taylor Swift sent fans at her Miami, Florida concert into a frenzy at the weekend (12Nov11) when she performed a surprise duet with rapper Flo Rida.

The Love Story hitmaker recently invited R&B singer Usher and hip-hop star T.I. to join her onstage on the Atlanta, Georgia dates of her Speak Now tour, and on Saturday she stunned gig-goers by introducing another major urban star to the platform.

Flo Rida performed his hit Right Round during her concert and after the gig, an ecstatic Swift took to her Twitter.com page to write, "Miami was awesome! Thanks to all the fans who traveled from all over, and to @official_flo for singing 'right round' with me! Insane night!"

And Flo Rida was equally as happy with the collaboration, tweeting to his fans, "GoodFeeling on stage with @Taylorswift13"