Perez Hilton photoshopped his presence onto the image of SXSW yet again this year, hosting a late-night last-night party that drew Hole, Snoop Dogg, and Estelle, but it's the earlier set featuring Macy Gray that caught our attention for her choice of cover: Arcade Fire's "Wake Up." If your eye's cocked at mainstream artists covering Arcade Fire as a ploy ...