The 7:00p hour of tabloid styled entertainment television is about to heat up. Variety just reported that after 29 years of doing ‘ET,’ the lovable and easy to talk to Mary Hart will be leaving the landmark entertainment news magazine to go do other things with her life. Rumors are swirling that Lara Spencer from “The Insider” is in line to replace her. Watch the claws come out now to fight for that gig. According to CBS, no official replacement has been set.