On the September 8 broadcast of Mnet's 'Idol School', PRISTIN made a surprise appearance on the show and shared a helpful tip with the trainees!

The episode consisted of the students visiting the Pledis Entertainment building, and the girls couldn't help but beam as they saw PRISTIN entering the rehearsal studio.

SEE ALSO: NewJeans drops the official music video for "Bubble Gum"

Regarding how to dance their "WEE WOO" choreography, "If you dance after deciding on a concept, the expressions will come naturally."  PRISTIN also added, "We became attached to them... We're somewhat envious of the fact that they get to debut in 11 weeks, and this is coming from a group who trained for a long period of time."