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Fergalicious, a hit song by Fergie, was produced by will.i.am. The song, released in 2006, became a global success, reaching the top of the charts in several countries. It is known for its catchy beat, Fergie's confident lyrics, and will.i.am's signature production style. The song's success helped establish Fergie as a solo artist and showcased will.i.am's versatility as a producer.