Season 1

• 4 Minutes - Madonna feat. Justin Timberlake and Timbaland
• Bad Romance - Lady Gaga
• Bohemian Rhapsody - Queen
• The Boy Is Mine - Brandy and Monica
• Defying Gravity - from Wicked
• Don't Rain on My Parade - from Funny Girl
• Don't Stop Believin' - Journey
• Dream On - Aerosmith
• Gives You Hell - The All-American Rejects
• It's My Life/Confessions Part II - Bon Jovi/Usher
• The Lady Is a Tramp - Sammy Davis Jr.
• My Life Would Suck Without You - Kelly Clarkson
• Open Your Heart/Borderline - Madonna
• Smile - Charlie Chaplin
• Somebody to Love - Queen
• Sweet Caroline - Neil Diamond

Season 2

• As If We Never Said Goodbye - from Sunset Boulevard
• Blackbird - The Beatles
• Born This Way - Lady Gaga
• Firework - Katy Perry
• For Good - from Wicked
• Hey, Soul Sister - Train
• I Feel Pretty/Unpretty - from West Side Story/TLC
• The Only Exception - Paramore
• Raise Your Glass - Pink
• Start Me Up/Livin' On a Prayer - The Rolling Stones/Bon Jovi
• Teenage Dream - Katy Perry

Season 3

• Somewhere - from West Side Story

... aaand I've pretty much stopped watching Glee after this point