Is This Britney Spears' Demo of Lady Gaga's 'Telephone'? An Analysis Max Read · 05/02/10 10:41PM The purported Britney Spears demo of "Telephone"—originally written for Spears by Lady Gaga before Gaga hit it big—has leaked. That sound you just heard was "BritBrit" overtaking "Bieber" on Twitter. We have the track, and some theories.