 Cameo appearances have been made by Phil Collen, Joe Elliott, Bob Dylan, Jeremy McKinnon, Meredith Vieira, the Oak Ridge Boys, George Stephanopoulos, Matt Kenseth, Steve Carell, Kip Winger, Roger Daltrey, Katie Couric, Vic Flick and Butch Harmon.By January 2011, "Pawn Stars" was History's highest-rated series.An original episode broadcast on January 24, 2011 was watched by seven million viewers, the most-watched telecast ever on History, according to the network and Nielsen Media Research.