With their killer hooks and broad mainstream appeal, it's no surprise that Def Leppard have influenced a wide variety of artists. You can hear their pulsing pop metal and stacked backing vocals in Bon Jovi's “Living on a Prayer” and Extreme's “Kid Ego,” their soaring choruses in Pink's airtight electro-pop, and their huge beats in Lady Gaga's “Yoü and I.” Don't forget their mastery of the hard-rock power ballad, which did not go unnoticed by the likes of Tesla and L.A. Guns.