Taylor Swift should rename her Speak Now tour to the Hip-Hop Now tour with the list of rappers making surprise appearances on her U.S. trek. Not that we are complaining because all of it has been entertaining, so far. The latest rapper to hit the stage with Swift was Nelly, who performed his chart-topping track 'Just a Dream' during the country songbird's tour stop in Houston, Texas.

While the band played a few chords from the song, Swift teased the audience that someone famous is waiting backstage. "I’m really excited right now, we have a special guest," she said before announcing, "Ladies and Gentlemen, Nelly is here.” The fans gave the S. Louis rhyme-slinger a warm welcome as he performed his inspiring song. Afterward, Swift tweeted, "Singing 'Just A Dream' with Nelly was a serious lifetime highlight. Fantastic night."

Nelly is among the 16 artists that have appeared on the singer's North American tour. Rappers like Nicki Minaj, T.I., and B.o.B. have previously joined Swift onstage.

"I'm a huge hip-hop fan, and it's been so amazing to have so many incredible artists come out and to get to sing the hooks on their songs that I've been blasting in my car for the last couple years," Swift says about past her invited guests. Swift has also performed cover songs by artists such as Jordin Sparks and Justin Timberlake.

Watch Taylor Swift Perform 'Just a Dream' With Nelly