Hollywood may be the land where dreams are born, but staying there takes grit, talent, and timing. Tom Selleck is one of the few who has done it for decades. He first gained fame as Thomas Magnum in Magnum, P.I.—a role that earned him five Emmy nominations (and a win in 1985). Now, fans are buzzing over rumors about his health. Here’s what we really know. There’s no confirmed report that Tom Selleck has been hospitalized or is in critical condition. Neither his representatives nor reliable news outlets have made announcements to that effect. The health scare circulating online seems…