- History of Everything(uncredited)Written by Barenaked LadiesPerformed by Barenaked Ladies[Series theme song played during the opening titles]
- Bust a Move(uncredited)Performed by Kunal Nayyar & Johnny Galecki[Raj and Leonard perform the song in karaoke]
- Baby(uncredited)Performed by Kaley Cuoco, Mayim Bialik[Penny and Amy perform the song to Bernadette in karaoke]
- Baby I Need Your Loving(uncredited)Performed by Simon Helberg[Howard performs the song to Bernadette in karaoke]
- Push It(uncredited)Written by Hurby 'Luv Bug' Azor & Ray DaviesPerformed by Kunal Nayyar & Johnny Galecki[Raj and Leonard perform the song to Bernadette in karaoke]
- America(uncredited)Music by Henry CareyLyrics by Samuel Francis SmithPerformed by Jim Parsons[Sheldon performs the song in karaoke]
- (You're) Having My Baby(uncredited)Written by Paul AnkaPerformed by Simon Helberg[Howard performs the song to Bernadette in karaoke]
- History of Everything (Instrumental version)(uncredited)Written by Barenaked LadiesPerformed by Barenaked Ladies[Instrumental version of series theme song played over the closing credits]
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