Hassle is best known for his European hits Hurtful and Don't Bring Flowers, while Troth has been making his mark as a pop producer since last year, having produced Jennifer Lopez's Worry No More and Kelly Rowland's Pepsi promotional single The Game.
The K-pop superstar has worked with a tonne of different producers for her solo album, including Diplo, Blood Diamonds, hip-hop songwriter Bobby Brackins, and Sean Garrett.
With super manager Scooter Braun behind her, it looks like CL has huge chance of seriously slaying her U.S. debut!
Dope stuff in the with @chaelinCL & @jaketroth pic.twitter.com/M18fZi1Hlm
— Erik Hassle (@erikhassle) January 31, 2015