NS Yoon-G is no stranger to paying homage to other artists (i.e. robbing at gunpoint). She delivered a bubblegum "Bulletproof" with her early single "Don't Go Back," and then transformed herself into JLo's skeleton for "Wifey" earlier this year.
SISTAR is the biggest post-T-ara girl group in K-pop. For the most part they've done their best to keep their sound fresh without straying too far from their signature traits, but somehow they've earned a reputation among certain K-pop fans for being serial song recyclers like AOA.
Brave Brothers has a habit of finding a winning formula and then milking it for all its worth, right before switching to something fresh just when you think you can't possibly take another rehash of one of his previous hits.
I was kind of on the fence with MAMAMOO until they converted me with the bluesy "AAH OOP!". Of course because I loved it so much it became their biggest chart flop ever, but thankfully the same can't be said for their latest single, "Um Oh Ah Yeah."