In the wake of Nirvana singer Kurt Cobain's death, a new style of music called post-grunge evolved. Similar to the relationship between pop punk and punk rock, post-grunge differed from grunge in its more radio-friendly pop-oriented sound. After Australia's Silverchair achieved international success with their debut album Frogstomp record labels began to actively search for the "next Nirvana". Former Nirvana drummer Dave Grohl's new band the Foo Fighters helped further popularize the genre, and other bands such as Bush, Creed, Audioslave, Candlebox, Collective Soul, Everclear and Live helped cement post-grunge as one of the most commercially viable sub-genres of the late 1990s. Female solo artist Alanis Morissette also found success while being labeled under the post-grunge tag. In 1995, her album Jagged Little Pill became a major hit by featuring blunt, revealing songs such as "You Oughta Know". Combining the confessional, female-centered lyrics of artists such as Tori Amos with a post-grunge, guitar-based sound created by producer Glen Ballard, it succeeded in moving the introspection that had become so common in grunge to the mainstream. The success of Jagged Little Pill influenced successful more pop-oriented female artists during the late 90s including Fiona Apple, Jewel and Liz Phair.