Two-time Grammy Award and seven-time Latin Grammy Award winner Gustavo Celis – a recording engineer, mixer and producer – reflects on mixing Shakira and Beyoncé’s 2007 hit, Beautiful Liar, engineering Shakira’s 2006 hit, Hips Don’t Lie (one of the best selling singles of all time), and why he chose Genelec monitors for his Dolby Atmos studio.