With the discussions about whether the Super Bowl halftime show was lip-synced or not, I thought it was worth bringing up iip-synching on various shows. One one hand, you have "American Bandstand" where virtually every performer lip-synced. On the other hand, "Saturday Night Live" for decades used to insist acts perform live. In recent years, acts like Halsey and Taylor Swift have been accused of lip syncing on "SNL". What shows preferred to lip-sync and which preferred live performances? And what were the notable exceptions?