The list of streaming holdouts just got shorter. British rock outfit Def Leppard has made its catalog of older albums available on streaming services for the first time. Until now, only the band's more recent releases were on the likes of Spotify and others. In other words, the material from the band's glory days -- like Pyromania and Hysteria -- weren't included in music services' catalogs. Of course, it's also a nice bit of promotion ahead of the group's summer tour with Journey.