Franz Ferdinand rocker Alex Kapranos has called out Pharrell Williams on Twitter.com after suggesting the Grammy-winning producer lifted a guitar riff from one of his band's songs for a new track with Paloma Faith. The Scottish star took to his Twitter.com blog on Friday (31Jan14) to share the observation with fans by uploading a YouTube.com link to English singer Faith's new single, Can't Rely on You. Alongside the video link, he wrote, "Hey @Pharrell - I love your tunes. If you want to borrow a riff, just ask..." Kapranos did not name the Franz Ferdinand tune he was referring to, but the chords featured on Faith and Williams' collaboration bares similarities to the band's 2004 hit Take Me Out. Williams, who won four prizes at last weekend's (26Jan14) Grammy Awards, including Producer of the Year, has yet to respond to the allegation.