Here's a look back on who was on 'Global News Morning Saskatoon' for Wednesday, July 20.

The students and their teacher were floored when the Wiggles trotted in unannounced, listened to the teens perform and later asked Colbourne if the kids would like to perform on stage with them.

The Australian musical group will kick off the Rock & Roll Preschool tour on Sept. 15 in North Bay, Ont. and stop in 22 other Canadian cities.