Big Time Rush won again! Yesterday's 'Sound Off' put their track 'Music Sounds Better With U' up against 'I Like It Like that' by pop quartet Hot Chelle Rae. Big Time Rush easily won with more than 66% votes, so now we think the boy band is ready to go up against the Queen of Pop (in terms of No. 1 singles) Katy Perry.

OK, maybe it's going to be tough competition for Big Time Rush. But we like the idea of putting two upbeat love songs up against each other. Plus, this is a good test for Katy Perry -- to see if 'The One That Got Away' is capable of being her sixth No. 1 single off 'Teenage Dream,' and therefore beating Michael Jackson's record.  So guys, be sure to cast your votes for either Big Time Rush or Katy Perry below and we'll let you know who wins on Monday!

Listen to Big Time Rush, 'Music Sounds Better With U'

Listen to Katy Perry, 'The One That Got Away'