In the season finale, the final three contestants face-off to win their dream role on Glee.

Kevin McHale makes an appearance when the remaining players’ generosity is assessed. In addition, the homework assignment of My Chemical Romance’s ‘Sing’ is boosted by the arrival of surprise guests. This week’s music video will a mash-up of ‘Defying Gravity’ and ‘Lean on Me’.

Actress-singer Jenna Ushkowitz (“Glee”) is on hand in a challenge that appraises the contestants’ ability to be believed. Included: a group performance of the song “The Only Exception.

The final six contestants much explore their sexuality in this week’s challenge.

The contestants must prove to the mentors that they are tenacious enough to perform a mash-up song.

The remaining eight contestants are paired up in a challenge that demands cooperation: singing duets.

The remaining contestants must show off their best moves when they are judged on their ability to dance.

The contestants muts tap into their vulnerable sides in order to perform a memorable rendition of “Mad World.”

In the second challenge, the remaining contestants must prove their theatricality by performing “We’re Not Gonna Take It.”

In the series premiere, the top 12 contestants must show off their individuality to the mentors.