Some 8.5 million viewers tuned in for the Season 3 premiere of Jersey Shore on MTV last night, making it the highest-rated series telecast on MTV ever. It shattered Jersey Shore‘s previous record for most-watched episode, which was 6.7 million. In MTV’s target demo of persons 12-34, the Jersey Shore premiere (8.3 rating) was up 63% vs. the reality series’ Season 2 debut. And despite airing at 10 PM, Jersey Shore was the second highest-rated program on any network among adults 18-49 behind CBS’ The Big Bang Theory.