Nirvana's follow-up album "In Utero" (1993) featured an intentionally abrasive album that Nirvana bassist Krist Novoselic described as a "wild aggressive sound, a true alternative record". Nevertheless, upon its release in September 1993, "In Utero" topped the "Billboard" charts. In 1996, "In Utero" was certified 5x platinum by the RIAA. Pearl Jam also continued to perform well commercially with its second album, "Vs." (1993). The album sold a record 950,378 copies in its first week of release, topped the "Billboard" charts, and outperformed all other entries in the top ten that week combined. In 1993, the grunge band Candlebox released their self-titled album, which was certified by the RIAA. In February 1994, Alice in Chains' EP, "Jar of Flies" peaked at number 1 on the "Billboard" 200 album chart. Soundgarden's album "Superunknown", which was also released in 1994, peaked at number 1 on the "Billboard" 200 chart, and was certified 5x platinum by the RIAA. In 1995, Alice in Chains' self-titled album became their second number 1 album on the "Billboard" 200, and was certified 2x platinum.