The always-controversial Madonna turns 54 today (Happy Birthday!), so in true Blisstree style, we are celebrating her fitness–specifically, those awesome, buff arms. Over the years, Madonna’s muscular arms have sparked tons of debate. Some have described them as scary, unhealthy, grotesque and even unfeminine with “protruding biceps and bulging veins.” This has lead some to wonder if a sculpted physique can still be considered feminine and sexy. We say, hell yes! So in honor of Madonna’s birthday, we are celebrating with a “Birthday Call to Arms.” Take a look at the Material Girl’s rock-hard arms over the years–and be inspired!