Macklemore & Ryan Lewis collaborator Mary Lambert was given just a couple of hours to come up with the hook for their Grammy Award-nominated song Same Love. The music newcomer reveals she had never even met the then-rising hip-hop stars when she was asked to work on the chorus at the last minute - and she had to think fast to write and record it right in front of the duo. The singer tells the Associated Press, "I was sort of a last resort. It was a match made in heaven." Lambert penned the hook in "about two or three hours" and Macklemore & Ryan Lewis were immediately impressed: "They loved it. It was like this beautiful minute of silence after I sung the chorus." The rappers aren't the only ones who have become big fans of Lambert's work - Same Love, which champions gay rights, has landed the musicians a nomination for Song of the Year at this weekend's (26Jan14) Grammy Awards, one of seven top honours Macklemore and Lewis have been shortlisted for. The tune has been adopted as an unofficial anthem by same-sex marriage supporters in their continued fight for the legalisation of gay unions across America, and Macklemore & Ryan Lewis' manager, Zach Quillen, admits the Grammy nod is the icing on the cake for the stars. Quillen says, "We'd probably all agree that the nomination for Song of the Year for Same Love, in particular, is quite meaningful for us, in what the song has turned out to be and (what it) means to people. We regard it as our highest accomplishment." Macklemore & Ryan Lewis are also up for prizes including Album Of The Year and Best Rap Album for The Heist at Sunday's ceremony.