Over the weekend, Kristen Wiig, Tina Fey, Jimmy Fallon had a few good laughs at the east coast ceremony for the Writers Guild Awards, George Steel and Lou Reed toasted Rufus Wainwright's opening night for the Prima Donna Opera, Brazil's Carnival Festival was brought to Studio 21, Madonna held a last minute tribute for Whitney Houston at Mister H, and so much more. Last night's parties were all about celebrations!