Nicki Minaj Dances "Till The World Ends" On Opening Night Of Britney's "Femme Fatale" Tour (PHOTOS)

Nicki Minaj brought the house down on the opening night of Britney Spears' "Femme Fatale" tour.

Nicki and Britney collaborated on Britney's hit song "Till The World Ends (Remix)," and it went so well, that Britney invited the "Pink Friday" rapper to join her on tour.

MUSIC: Nicki Minaj, Britney Spears, & Ke$ha Team Up On "Till The World Ends (Remix)"

Dressed in a black bodysuit, laced with glow-in-the-dark white piping and yellow wedge shoes, Nicki Minaj hyped the crowd as she rapped "Super Bass," "Roman's Revenge," and "Right Thru Me."

Rocking her blonde bob, Nicki swung her hair all around as she danced to her sweet and sexy jam "Super Bass."

Word on the street is Britney Spears is officially back and her opening night on the "Femme Fatale" tour solidified that notion.

Check out more pics of Nicki on the next few pages!