N.E.R.D.'s Pharrell Williams and Baltimore MC Rye Rye joined a visibly-pregnant M.I.A. on stage for a performance of "Paper Planes" at Diesel's XXX party this past weekend. The set was M.I.A.'s first since announcing her "retirement" at this year's Bonnaroo festival. Due in part to its inclusion in trailers for this summer’s Pineapple Express, "Paper Planes" has become a mainstream radio success despite being initially released in early 2007.