They've actually collaborated before on a similar track, "Bang," though I think "Sunshine" is a superior song:
However annoying I find M.I.A.'s politics, I do very much want her to be commercially and artistically successful, and I'm thrilled that she's supporting talented young women in hip-hop. Most of the time I just want art to be a meritocracy, but when it comes to hip-hop, I want women to have the right to be as stupid as Soulja Boy and to not have that affect perceptions of their female colleagues, for there to be a woman in the game as angry and as articulate as Eminem, as weird as Eminem. I want women to conquer so I get to the point where I feel like I can be discerning. Not that I don't have a lot of fun with Nicki Minaj, but I want her to be a guilty pleasure, rather than the best chance present chance for women to conquer the hip-hop charts and airwaves—it's pretty pathetic that she was the first woman to top the rap charts with a solo song since 2002.