Ahead of The Voice starting on August 8, Jessica Mauboy joins Erin & Soda and puts her singing expertise to the test.

In a song contest, Jess judges the best female singers to determine WHO is the absolute best of all time.

Find out who is her number 1 here:

Want more? Listen to one of our favourite moments from Erin Phillips & Soda – Tune in weekdays from 6AM on Mix102.3!