John 'Jack' Smith, a renowned adman and executive at Leo Burnett, has passed away at the age of 87 due to complications from progressive supra nuclear palsy. Smith was known for writing music and lyrics for clients such as McDonald's and United Airlines. He was also a top creative at the firm and served as an executive vice president. Smith's ability to communicate a human note about a brand or a product was described as his greatest strength, according to Mary Ann Quick, a former executive VP president at Lebon. Smith also contributed to the United account's “Friendly Skies” campaign.