Yesterday, it was revealed that Big Bang was named as the new endorsement models for Ludacris's luxury headphones line, 'Soul by Ludacris'. Well, the headphones are already up for sale on YG Entertainment's eShop and a flash advertisement featuring Big Bang was also revealed on the website. On September 29th, Big Bang and other top celebrities will also be attending the launch party for the brand. Big Bang also has a lot of fun promotional events lined up that fans can look forward to. In the mean time check out the advertisement below, you can also purchase the headphones at YG Entertainment's eShop. [gallery]