Looks like R&B diva Beyonce is back in the lab working on new material for her as-yet-untitled third solo album. The Polow Da Don-produced track dubbed 'Beautiful Nightmare' has been leaked onto the internet and its expected to be the first single off the singer's new project. According to reports, the singer's new album is due this fall.

In the meantime, the 10-time Grammy winner is producing and co-starring as Etta James in the 1950s period flick, 'Cadillac Records.'

Listen to 'Beautiful Nightmare.'