The following operations are performed on an initially empty stack named musicIdol.

musicIdol.push$("$Drake$")$

musicIdol.push$("$Beyonce$")$

musicIdol.push$("$Bieber$")$

musicIdol.peek$()$

musicIdol.push$("$Sheeran$")$

musicIdol.pop$()$

musicIdol.pop$()$

musicIdol.peek$()$

musicIdol.push$("$Rihanna$")$

After all the operations have been executed, the number of elements in musicIdol are: