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Granted, KPop sensation 2PM's latest endeavor, "Crazy4S," might be an endorsement song, but it's a really great endorsement song. To take it a step further, it's a huge step in the right direction for the boy band in terms of maturity and sound. They're embracing HipTronik and we couldn't be happier. The track alternates between auto-tuned and natural, and the beat backing them up is sick. Let's see what we have here: Cute boys? Check. Hot dance routine? Check. Catchy hook? Check. Honestly, what more do you need?