"Do you know who we're trying to get into a pair of our jeans?" volunteers Timberlake, pale and slight, but perky, at the end of a long day giving interviews about the British launch of his new womenswear line for William Rast, the premium denim brand he founded with his childhood friend Ayala in 2005. "Prince William - he'd look pretty cool in Rast. And Harry too." Harry's an outlaw, I tell them, so probably in keeping with their "Badlands" ethos. "So we've heard," he chuckles.