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As reported by
The Boot , the surprises keep coming on
Taylor Swift 's
Speak Now World tour . During her sold-out, four-show run at Los Angeles' Staples Center, the singing superstar has treated her fans to duets with some of her most famous friends, including
Justin Bieber ,
Ellen DeGeneres ,
Jason Mraz and
Hot Chelle Rae (a pop band who helped write Taylor's hilarious '
Thug Story ' duet with
T-Pain ).
Sunday night's show saw the country cutie doing a little rapping, as her pal
Nicki Minaj showed up to sing her hit, 'Super Bass,' with Taylor. Watch a fan's video of the performance below.
Nicki was doing double-duty on Sunday. She jetted over to Taylor's concert just after
winning Best Hip-Hop Video at the
MTV Video Music Awards .
Watch Nicki Minaj and Taylor Swift Perform 'Super Bass' Live
Watch Nicki Minaj's 'Super Bass' Video
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