f(x)'s Krystal stars in another CF for 'Clean & Clear'. Last time, Krystal was paired with SNSD's Seohyun for Clean & Clear but the newest CF has replaced Seohyun with Kim Ji Won. Kim Ji Won is an up and coming actress who will star with Krystal in the upcoming 'High Kick 3'. Check out the adorable CF below! [Thanks to everyone who sent this in.]