f(x)'s Krystal and SNSD's Seohyun have teamed up once again to release another CF for 'Clean & Clear'! The short CF advertises the brand's 'Deep Action Blackhead Cleanser', which Seohyun recommends to Krystal after hearing her woes about her blackheads. To demonstrate,�Seohyun expertly washes her face, revealing her pure, baby-soft skin. The two girls wrap up with CF with a cheerful reminder: "(Keep your skin) Clean, Pure, and Confident!" Check out the video below! Tip: shroom