Pepsi “Now And Then” [01:30]# Starring in Pepsi’s probably most expensive TV commercial ever is superstar and everybody’s darling Britney Spears. The spot, which first aired during this year’s Superbowl, takes us on a journey through the advertising highlights of the soft drink giant. Start-ing with a remake of a spot from the year 1958, Britney guides us through 1963, 1966, 1970 and 1989 into the slightly overstyled present time. Sometimes, one does long for the “good old days”…