Singer Justin Timberlake has inked an estimated $6 million deal with McDonald's to help the fast food chain promote the new "I'm Lovin' It" tag line. The campaign launches this month and will be featured in 110 countries. Timberlake will not only lend his mug to the new campaign but also his vocals. In addition to the commercials, McDonald's will sponsor Timberlake's European leg of his "Justified" tour.