Listening to Hellogoodbye's infectious new song "Killin Time," you wouldn't expect it was written in two days. Believe it. The band recently spent two days in Las Vegas writing and recording this little number, which is now yours to rock along to via free download over at SoundCloud. With it's slight surf-rock appeal, sunny pop melodies, and choruses that beg you to clap your hands, we'd say time in Sin City served the boys well. Give it a spin and go watch a short documentary of the band's songwriting process over at Alter the Press.