The circus will be back 'by popular demand' [=because many people want it to come back] later this summer.
Because of 'popular demand', the restaurant has published a cookbook of favorite recipes.
The word “groovy” was 'popular' in the 1960s but it's outdated now.
(..) Alex? How does it...? - Who did this to you? - The basketball team. But why? Why? You're one of them. You're popular. Uh, look, this is kind of personal, and I don't know you. - I'm taped to the toilet. - Yeah. I'm sorry, I'm Mark Gold, uh, (..)2009 17 Again