The first surprise (so far) at the VMA's? Nelly Furtado's new blonde do! The singer, 28, showed off the lighter locks at a pre-party September 7 at club Jet at the Mirage Las Vegas Hotel and Casino with fiance Demacio "Demo" Castellon. "She was glued to her guy nearly the entire night," a witness says. "Nelly was sitting on his lap for a long time, and then while dancing with him, she unbuttoned his shirt and rubbed her hands down his bare chest!" She took a breather with Us to dish about the big VMA night. Nervous about performing? "I'm super excited. I had to skip out last year because of a family engagement, but this year I'm here, and it's twice as nice." What are you looking forward to most? "Honestly, Vegas is just fun. Fun is in the air. Every time I play a show here I've had a good time. It's carefree." Who are you excited to see? Britney? "Oh, all of them. I like the surprises!"