This week we’re discussing every album by ABBA. They need no introduction, but we will say that they are more than just a disco band—ABBA is an all-around pop juggernaut. With hits like “Waterloo,” “Dancing Queen,” and “Gimme! Gimme! Gimme!,” it’s obvious why they were so huge. But they have a thousand great songs you haven’t heard. Grab your platform shoes and get ready.