If you're as excited as we are for Wicked's 15th birthday celebrations and the huge concert on NBC tonight, you probably have the Original Cast Recording on repeat. As Wicked hysteria hits fever pitch we take you through our favorite tracks.

Wendy's Pick - Defying Gravity
It may be everyone's first choice but who can blame them! This epic act one closer is probably one of the most powerful Broadway has ever seen. Full of goose-bump moments, Elphaba finally breaks free from the bondage of public opinion and sets herself free, flying (literally) out into the world with her new found confidence. With its whopping crescendo's this is the perfect song to sing at the top of your lungs!

Abigail's Pick - No Good Deed
Another belter courtesy of Elphaba, No Good Deed is another track ripe to be sung from the rooftops. A turning point in the musical, Elphaba realises that she'll never be adored by those around her and sinks into her already perceived wickedness.

Kitty's Pick - Popular
Popular is the funniest song in the show by far, providing some light-hearted relief and showcasing the blossoming friendship between our two leading ladies. With its fast-paced melody and comedic lyrics, Popular has been covered by stars like Ariana Grande and featured by Kanye West!

Scarlet's Pick - Dancing Through Life
It's a long one, but oh so good! Dancing Through Life if where we meet the show's heart-throb, Fieyro. Showcasing his care-free and somewhat unrealistic view on the world, this young prince gets the shock of his life when a certain green skin girl steals his heart...

Do you agree with our picks? With over 22 songs to chose from Wicked really does have something for everyone. Don't miss Wicked's 15th-anniversary celebrations tonight (October 29) on NBC where the likes of Idina Menzel, Kristin Chenoweth and Ariana Grande perform some of their favorite tracks!