Dina 2005, Martin kolaborasi jeung Nelly Furtado dina lagu "All Good Things (Come to an End)", pikeun album taun 2006, Loose. Duaan ieu sakali dikabarkan janten pasangan, sanggeus duanana tampil di Glastonbury dina 2002. Nelly Furtado bercanda ngeunaan hal éta, nyebutkeun, "Yeah, he's my boyfriend yet doesn't know it". Martin ogé kolaborasi jeung Ron Sexsmith, Faultline, the Streets, jeung Ian McCulloch. Martin ogé nyanyi bagian vokal pikeun Band Aid 20 single, "Do They Know It's Christmas?" di ahir taun 2004. Martin kolaborasi jeung Nelly Furtado dina lagu "All Good Things (Come to an End)", pikeun album taun 2006, Loose. Duaan ieu sakali dikabarkan janten pasangan, sanggeus duanana tampil di Glastonbury dina taun 2002. Nelly Furtado bercanda ngeunaan hal éta, nyebutkeun, "Yeah, he's my boyfriend yet doesn't know it". Martin ogé kolaborasi jeung Ron Sexsmith, Faultline, the Streets, jeung Ian McCulloch.
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