Some nice clues, with a smattering of annoying obscurities. I also had never heard of 'reggaeton' in 5d, and didn't like 'burden' meaning 'chorus' in 33a: Hard to bear chorus with two notes (10).
It is with great trepidation that I disagree with the couple of sites and Jazzgirl but surely the clue is saying that it sounds like CHEEP and the answer is CHEAP.