Pet Shop Boys are an English synth-pop duo, formed in London in 1981 and consisting of Neil Tennant (lead vocals, keyboards, occasional guitar) and Chris Lowe (keyboards, vocals). Pet Shop Boys have sold more than 50 million records worldwide, and are listed as the most successful duo in UK music history by The Guinness Book of Records. Three-time Brit Award winners and six-time Grammy nominees, since 1985 they have achieved 42 Top 30 singles, 22 of them Top 10 hits in the UK Singles Chart, including four UK number ones: "West End Girls" (also number one on the US Billboard Hot 100), "It's a Sin", an acclaimed cover of "Always on My Mind" and "Heart". Other hit songs include a cover of "Go West", "Opportunities (Let's Make Lots of Money)" and "What Have I Done to Deserve This?" in a duet with Dusty Springfield. At the 2009 Brit Awards in London, Pet Shop Boys received an award for Outstanding Contribution to Music.