Patrick Stump killed Gym Class Heroes in yesterday's 'Sound Off,' earning more than 80% of the votes for his catchy song 'This City'! Now that Patrick's on a winning-streak, we've got his Lupe Fiasco-assisted song up against the peppy 'Keep Your Head Up' by singer-songwriter Andy Grammer

Grammer's tracks have a mixture of melodic hooks mixed with Jason Mraz attitude -- making this quite a competition! With both Stump and Grammer debut albums this year, we feel like this is the perfection match! Cast your vote for either Patrick Stump's 'This City' or Andy Grammer's 'Keep Your Head Up' below and we'll let you know who wins tomorrow!

Listen to Patrick Stump, 'This City' Feat. Lupe Fiasco

Listen to Andy Grammer, 'Keep Your Head Up'

Rules of ‘Sound Off’:
There’s only one rule for our ‘Sound Off’ series: If a song remains the reigning champ for five straight days, it is retired to PopCrush’s ‘Sound Off’ Hall of Fame. With tons of great tracks coming out everyday day, we have to give other artists a chance to win!