(Yahoo!) - Rihanna is having some fun, mixing things up for her 777 Tour that his touching down in seven countries in seven days. Since the beginning of the tour which opened in Mexico City Wednesday, Rihanna has been performing a special live version of her song "What's My Name," a collaboration with Drake.
For the live version, Rihanna pipes in a few seconds of Tyga's monster hit, "Rack City." In an interview with 777 Tour musical director Adam Blackstone, he explains how the "Rack City" remix idea was conceived.
"We just jamming out in rehearsal to 'Rack City,'" Blackstone told Yahoo! Music Saturday while en route to Paris on the private 777 Tour twinjet. "We thought of some things to kinda switch it up. We had been doing it the same way for a little bit."
Above, see Rihanna performing the "Rack City" mix in Stockholm, Sweden.
The 777 Tour stops in Berlin on Sunday, London on Monday and wraps in New York on Tuesday.
Rihanna's seventh album, "Unapologetic," will be released Tuesday, November 19. Rihanna just released a remix of her single "Diamonds" featuring Kanye West.