By one metric, Coldplay’s latest album, Mylo Xyloto (released last week), is already a success. After one full week on the charts, it’s nabbed the No. 1 spot with 447,000 units sold. By another measure, though, it will be some time before we know how Mylo stacks up to the rest of the band’s catalog. And that measure is, of course, the manner and rate with which rappers mine Mylo tracks for samples. Historically, the mellifluous hooks and gentle harmonizing of the band has been a rich source for hip-hop. Jay-Z and Kanye took the practice a step further by actually hiring Chris Martin, for “Beach Chair” and "Homecoming,” respectively (As ‘Ye explained on “Big Brother,” he got burned on that one: “I told Jay I did a song with Coldplay / next thing I know he got a song with”). For a purer research field, though, we’re only looking at tracks that sampled pre-exisiting Coldplay jams (made possible thanks to the fine folks at WhoSampled). Herewith, a brief look back at the practice.