Today is a hard day for weezer and all weezer friends, fans, and family. While everyone is still in shock over  yesterday's tragic loss of Mikey Welsh, we know damn well he would never have wanted to stop the rock at today's RIOTfest, the show he was planning on attending. On the contrary, the rock was what he loved, both in music and art. To play the show and play it well tonight is to honor hi…