On Tuesday, March 29, Nicki Minaj attended and performed at the 2011 Green Auction: A Bid to Save the Earth in New York City at Christie's. A charity auction and runway show with sustainable pieces were held in order to raise awareness and funding for a more eco-friendly environment.

Ms. Minaj was invited to attend the event by the editor-in-chief of American Vogue, Anna Wintour, who Minaj gives a shout out to on her 'Pink Friday' track 'Muny' ("Hey, yo, Anna, hey yo Anna Wintour, I'ma need that cover baby girl, it's Pink Friday, ya dig"). Could this be a sign of an upcoming Harajuku Barbie issue of Vogue?

Before the show, Minaj tweeted, "Dear Barbz, who knew wen I gave anna wintour a s/o in "muny" she'd b calling me 2 perform @ a vogue charity event. Lmao. Headed there now : )." Minaj wore all black and a tall blond and green wig, similar to the one she rocked at the 2011 Grammy's. Check out the pictures of Nicki Minaj at the 2011 Green Auction and let us know which shot is your favorite.