Cabaret

From Degrassi Wiki

Ashley and Terri decide to take part in Degrassi's Cabaret by having a band called "2 Girls and a Keyboard" meanwhile Paige plots to join the girl group by using Terri's new found hobby for talbot readings to convince Ashley to let Paige join. Heads butt when Paige wants to rename the band "Paige Michalchuck and the Sex Kittens" while Ashley likes "3 girls and a Keyboard" Right before the talent show Ashley drops out of the band to soon discover Paige and Terri are a hit. Soon afterwards the 3 rejoin and shorten the name of the band calling it "PMS."