Photo by toastycakes via the LAist Featured Photos pool on Flickr HELP The biggest city-wide community service event happens today all around L.A. It’s the 10th Anniversary of Big Sunday, an event dedicated to bringing people together of all ages to help others. There will be a massive flea market and an art show to raise money for the underprivileged. 9 a.m. // Several locations around the city // Los Angeles // Free MUSIC......