Wendy's is bringing back its pretzel bun -- and using nostalgia to spread the word. A new campaign by PKT features the chain's "Red" character, walking around, dreaming of the pretzel bun, all while crooning Mr. Big's 1991 hit, "To Be With You." Last year, Nick Lachey featured in the ads for the launch of the pretzel bacon cheeseburger. Read more about the campaign on AdAge.com.