VIVA VEVO:UMG and Sony’s much-ballyhooed, YouTube-powered premium music video and entertainment service VEVO was the most visited U.S. web network in the Entertainment-Music category last month with 35.4 million unique visitors, according to comScore. The service’s December 8 launch means VEVO was not live for the full month, making the figure even more impressive. Of course, it finished second overall to the 48 million people who watched a youngster coming home from the dentist below.