Britney Spears and Nicki Minaj performed together on stage at the 2011 Billboard Music Awards held at the MGM Grand Garden Arena on Sunday, May 22, 2011 in Las Vegas, Nevada.

Nicki started out the performance with her song “Super Bass” before Britney hopped on stage to sing her hit song “Till the World Ends.”

The dynamic duo will be touring together this summer starting on June 16 in Sacramento, Calif. The pair will tour North America until the middle of August!