Okay, this a big guilty pleasure of mine, but I LOVE mashups, and I'd love to hear some of your favorites, especially if they involve drastically different genres. A few of my faves: 99 LuftProblems (99 Problems x 99 Luftballoons) X Gon Give To Ya Maybe (X Gon Give it to Ya x Call Me Maybe) Mother Was a Rolling Stone (Papa was a Rolling Stone x Mother) If You Wanna Breathe My Sulfur (If You Wanna Have Some Fun x Sulfur) Rage Against Vanessa Carlton (Killing in the Name of x Thousand Miles) Taylor Swift vs Nine Inch Nails - Shake It Off (Shake it Off x Perfect Drug)