We haven’t heard much from Spencer & Hill since their mind-blowing release of “1234” that followed its David Guetta, Electric Zoo debut. Following a four-month hiatus, the duo has returned to make the wait worthwhile. “Pump It Up” comes with waves of anticipation that give way to pulsating synths and a chugging rhythm. The electro bassline comes standard, but delivers Spencer & Hill’s latest offering to the American crowds while catering to dance floors worldwide. Aptly titled, “Pump It Up” will be one of this winter’s lead party starters.