Organizers of a 75th birthday tribute concert for John Lennon are casting a wide net to collect partiipating artists. Already expected for the December 5th concert at Madison Square Garden are Peter Frampton, Stephen Tyler, Tom Morello, the Roots, Willie Nelson, Sheryl Crow, Kris Kristofferson, Eric Church, Brandon Flowers of the Killers, with many more to be confirmed in the coming days. The concert will be filmed for future distribution, according to organizers. Some proceeds from the concert will be turned over to Robin Hood, a New York City organization that provides food and shelter services for the city's poor and homeless. The concert will be broadcast on Dec. 19 at 9pm on AMC.