If I'm drunk and alone, I'll play this song

Watching the not-very-funny comedy The Break-Up, I'm an Easter Island statue of ill-humour.

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Everyone else, however, is in stitches. The character played by Jennifer Aniston has a super-camp brother with mad, poppy eyes, and he is busy leading her and the rest of the family in an a cappella version of an old pop song; he's just kicked off proceedings by making a raspy farting noise presumably