Here are some things to know about all the pre-race entertainment going on at Daytona International Speedway before NASCAR's season-opening Daytona 500: --- VINCE VAUGHN: The Daytona 500 went old school with its selection of Vince Vaughn as grand marshal. Before Vaughn gave the command for drivers to start their engines, the ''Unfinished Business'' star had a bit of a long-distance dedication: ''I'd like to start this Daytona 500 off with a love song,'' he said. Vaughn refrained Sunday from belting out a tune - he made his name as a swinger not a singer - but he was still a big hit at Daytona International Speedway. ''I like to let the feelings hit me,'' he said Vaughn is the latest in a long list of Hollywood actors who have served as Daytona 500 grand marshal, including James Franco, Chris Evans, John Travolta, Ben Affleck, Nicolas Cage and Matthew McConaughey. More...