The Marauders getting drunk and singing Hey Jude by the Beatles:

James: HEY JUDE

Sirius: DON'T MAKE IT BAD

Remus: TAKE A SAD SONG

Peter: AND MAKE IT BETTER

S/J: THE MINUTE YOU

R/P: LET HER INTO YOUR HEART

S/P/R/J: THEN YOU CAN START TO MAKE IT BETTER

P: BETTER

R: BETTER

S: BETTER

J: BETTER, BETTER, OH!

S/R/P: *silence*

Sirius: OMG PRONGSY WE DIDN'T KNOW YOU COULD SING THAT HIGH!

Remus: WHAT THE FUCK?!

Peter: *drunken applause*

Lily: NA NA NA NA NA NA NA NA NA NA HEY JUDE