Why were the Super Bowl ads packed with celebrities? 3 theories.

You may have noticed, if you watched Super Bowl LVI, that just about every one of the multimillion-dollar commercials featured at least one A-list celebrity, often more. There were reunited TV and movie casts and even a memorable spot with real-life couple Scarlett Johansson and Colin Jost sharing a comically dystopian version of their life together where Amazon's Alexa keeps things very real. "It's a delightful departure from last year's ad slate, which featured somber messages from everyday pe...