Jay Z is riding a hot streak at the moment -- his Magna Carta Holy Grail has sold more than 500,000 units its first week, making it the rapper's thirteenth no. 1 album on the Billboard chart, and he's just kicked off the Legends of the Summer stadium tour with one Justin Timberlake, packing Toronto's Roger Center Wednesday night with 45,000 rabid fans. His latest move? Dropping the hyphen from his name, at least according to Billboard editor Joe Levy, who cites Jay's record label as the source. With or without the hyphen, the events of the week are undeniable proof that the Jay Z moniker still spells success.