Score huge savings on top brands like Cuisinart, Gloria Vanderbilt, Fitbit and more at the retailer's holiday-season sale.

Whether you're ready for the sales madness or not, Black Friday discounts are already underway. Retailers such as Walmart, Target, and Best Buy are among many that have released early sales in the lead-up to the big day.

A new report analyzed thousands of Black Friday ads to figure out which stores are offering the best (and worst) discounts.