This week Starbucks rolled out a new line of sugar-laden Frappuccino flavors: Cupcake, Red Velvet Cake, Cotton Candy, Cinnamon Roll, Lemon Bar and Caramel Cocoa Cluster. A grande will cost you $4.75 and roughly 90 minutes on the spin bike, with calorie counts as high as 510 per serving. Starbucks is asking customers to vote on their favorite flavor before the end of this month. We predict the Lemon Bar is going to lose: It’s the least-fattening choice (350 calories), but local baristas say it’s also the least popular.