Justin Timberlake is finally addressing the Britney Spears double-denim debacle.<br />While on Australian talk show The Project to promote his new movie Trolls, the singer/actor hinted at regret over his iconic denim-on-denim masterpiece with former beau Britney Spears at the American Music Awards in 2001.<br />'If you wear denim on denim, it will get documented,' Justin said, making the hosts laugh.<br />When the talk centred around denim on denim coming back into fashion, Justin agreed but said only if 'it's worn properly.'