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The man who wrote the McDonald's "I'm Lovin' It" jingle has committed suicide at the age of 40.

Paul Tilley jumped to his death from the upper floor of a Chicago hotel.

Dad-of-two Tilley, from Texas, worked for the elite DDB ad agency.

His widow Cristina said yesterday: "Life is complicated and Paul was a complicated man. He loved words and he loved wordplay."

The I'm Lovin' It slogan was launched in 2003 with vocals by US pop megastar Justin Timberlake and has been translated into more than 20 languages.