<p>Spears will do an opening number with singer Rihanna, reports usmagzine.com. The 29-year-old popstar will also be performing for the first time with Nicki Minaj, 26, who will join Spears on her tour this year. They will perform on a remix of Spears' hit "Till The World Ends".</p>.<p>"I'm obviously honoured to be out with Britney. She's freakin' paved the way for so many things right now in pop culture. I'm excited to be on with her," said Minaj.</p>
<p>Spears will do an opening number with singer Rihanna, reports usmagzine.com. The 29-year-old popstar will also be performing for the first time with Nicki Minaj, 26, who will join Spears on her tour this year. They will perform on a remix of Spears' hit "Till The World Ends".</p>.<p>"I'm obviously honoured to be out with Britney. She's freakin' paved the way for so many things right now in pop culture. I'm excited to be on with her," said Minaj.</p>