D-squared - who recently had Rihanna work the catwalk for them at their spring 2008 show during Milan Fashion Week – should look to the latest Fused Celeb couple (I'm going with Fupple from now on) for their next runway extravaganza. Who could we talking about ? J-cubed. Of Course. As Starwatch reports today the internet is rife with . … speculation that singers Joe Jonas, 18 and JoJo are dating!