There aren't many settings where you can be in the presence of Grammy Award-winning artists, celebrity chefs or Super Bowl-winning quarterbacks when they aren't the stars of the show, but you can see more than your fair share sitting on the sidelines at big sporting events.
To be clear: We're talking about Adele, Guy Fieri and Russell Wilson -- a trio among the assortment of famous fans who have recently been spotted on the sidelines.
Whether it's to see postseason games during the NBA and Stanley Cup playoffs or early-season action in MLB and the WNBA, multiple leagues have attracted spectators from various social circles.