Female MC Nicki Minaj won’t be touring with Rihanna this summer after all. Just a few days after it was announced that Minaj, along with pop singer Ke$ha would be opening for Rihanna’s ‘Last Girl on Earth Tour, the rapper has decided to pull out. On Wednesday, she announced via Twitter, “I’m sorry 2 say I will not be going out on RiRi’s tour. I’ve decided 2 use that time 4 the completion of my album. Hope u understand.” Minaj will probably be replaced by another act, MTV.com reports.