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LMFAO (Laughing My Freaking Ass Off) was an American electronic dance music duo consisting of uncle Redfoo and nephew SkyBlu. They respectively are a son and grandson of Motown Records founder Berry Gordy, Jr. RedFoo and SkyBlu grew up in Pacific Palisades, Los Angeles, where they formed the group LMFAO in 2006 and later became part of the electro house scene. LMFAO started building a local buzz through its shows and radio play. In 2010, they were featured on David Guetta's song "Gettin' Over You", which charted all over Europe and the United States, including reaching number one on the UK Singles Chart.
LMFAO are best known for their hit song "Party Rock Anthem", which reached #1 in the United Kingdom, Australia, Belgium, Brazil, Canada, Denmark, France, Germany, Ireland, New Zealand, Switzerland and the United States. "Party Rock Anthem" also reached the top five in Italy and Norway and was the third best-selling digital single of 2011 with sales of 9.7 million copies worldwide. In September 2012, the duo announced they would be taking an indefinite hiatus.

Source: Wikipedia