XM Satellite Radio (Nasdaq: XMSR), is celebrating its 1 millionth customer today with an array of live festivities hosted by music legend Quincy Jones. The events include live performances by best-new-artist Grammy winner Shelby Lynne, Grammy-winning jazz artist Cassandra Wilson, R&B chart-topper Musiq, country artist and two-time Grammy winner Marty Stuart. XM delivers 101 digital radio channels