London - All proceeds will go to the actor's charitable foundation ahead of being auctioned 'to raise money for disadvantaged children who've not had the chance of buying the My World 2.0 album'.
The actor told Ellen DeGeneres the stray lone strand was spotted by staff at London's Madame Tussaud's.
Bieber was being 'fitted up' for a nude - er...new! - waxwork model of him during his London stay for the premiere of the movie Never Say Never.
The teensy bush corkscrew curl was discovered clinging to some underwear he was modelling for the waxen image.
Sculptors have told him they hope the statue will be ready to be unveiled in London and New York early next month.
Online auctioneers eGay estimate the pubic hair could fetch anything up to $5,000.