On Thursday, The Voice hosted a karaoke happy hour at Hyde Sunset Kitchen + Cocktail in West Hollywood, at which journalists sang with a live band for charity while the actual coaches – yes, Blake Shelton, Adam Levine, Christina Aguilera, and Pharrell Williams – looked on in amusement (or bemusement). It was supposed to be a celebratory event… but unfortunately, just hours earlier, the tragic news broke of Prince’s shocking death, casting a dark purple cloud over the party. Shelton’s likened Prince’s passing to “some sort of horrible terrorist attack” when speaking to Us Weekly on the event’s red carpet.