Two mega stars from opposite sides of the metal universe are celebrating milestone birthdays today! Both Slayer's Kerry King and Teutonic queen (and former Warlock singer) Doro Pesch are hitting the half century mark today!

In honor of this monumental occasion, here's Doro paying tribute to her mentor Ronnie James Dio, performing his hit "Rainbow in the Dark." And after that, enjoy a little bit of SLAAAAAAYYYYER! (C'mon, can anyone just SAY the name without screaming it?)